Engine Sensors

  Tel No. +612 4987 3775 
Skip Navigation Links.

efi spares trade tips



 Compression Test,Vacuum leaks!!!!


Always check injector pulse, spark & fuel supply EVEN  if you have a scan tool.

If you have no injector pulse, spark or fuel pump supply - check you have 12volts to these items.

If running rough - check cam timing and make sure piston is at TDC as pulleys & cam gears move.

If no power - make sure air intake or exhaust (cat) isn’t blocked.
To check cat remove 02 sensor & exhaust will flow out.

Check fuel flow.

*REMEMBER - Fuel flow is more important than fuel pressure. You must have a good return of fuel out of regulator. Same symptom as carby with low float level.

CODE Cat converter insufficient flow, this usually isn't the rear oxygen sensor. Check pattern of rear O2 sensor most rear O2 sensors at idle should be a flat line .5 of a volt, if sensor has a wave pattern or spike to much flow through cat. This is usually due to cars running E10 that shouldn't be. Ask customer have they been using E10 in car then check on website www.fcai.com.au/ethanol.php .You may have to replace cat converter or try O2 sensor first.



Cam & Crank sensors -  Wont start or runs on 2cylinders, cam or crank timing out
    Signal has to be at ECU from both sensors At exact time. Check cam & crank drives.

Spark plugs-   Make sure you have right plugs and gap.
    I have seen wrong length plugs & to small a gap causing misfire or no start!

Bad earths - Late model vehicles must have good earths or they will run rough or not start.  

  O2 Sensors - Make sure it is ok (switching voltage). Most late model cars have a fuse for 12 volts to 02 sensors,if you have a code heater circiut fault CHECK you have batt voltage to 02 sensor ,if not check fuses

Power steering - Most new cars have power steering unit as part of steering column, not rack it is computer operated and can cost up to $8 000 for new unit ( We are trying to repair these now).

Alternators - Most vehicles 2004 on have regulator in computer, check charge rate, if not charging maybe faulty computer not alternator.

Charcoal cannister & Purge control valves - Running rich _ Cars with map sensors. If purge control is leaking vacuum, it will cause running rich on cars with MAP sensor as it creates a vacuum leak at idle. The map sensor reads low vacuum and will richen the mixture.

Running rich and map sensor codes after fitting fuel pump ass,this is a common fault as hoses for purge and return at tank are on wrong way ,sucking fuel into manifold via purge valve and covering map sensor,mainly Commodores,Falcon utes and wagons,Hyundai

Cars with variable timing - Fault - No power cold - Wrong or old engine oil causing sensor to give false oil pressure reading to ECU. Wont drive sensor advance. Use oil flush & correct grade oil.       

Cars stuck in limp mode-check reverse & brake lights are working-check cruise contol as it it linked to brake light swich and fuse






Alfa 156 2000 on

No drive when put in gear (auto)power windows dont work

Blown power window fuse(located below steer column drivers side)

Alfa 156 JTS Misfire codes and misfire after changing coils Most have direct injection,injectors will be blocked ,fit new injector-common fault

Audi A4 2000 on

Gear selector will not shift out of park

check stop light fuse

Audi A4 Cabrio


No start

Earth post located below dash near fuse box securing 4 brown earth wires,poor connection.(clean)

Audi A6 1999 on

No start

Low oil level,will cause no start

BMW 84-96

No fuel pump supply

Check voltage to pump, if none ECU faulty, not switching relay

(Common fault).

BMW 84-96

Surging, lack of power.

Airflow meter! Check fuel pressure & flow.

BMW Most models ,with coil over


Find & replace faulty coils,BEWARE check earth circuit to coil before replacing ,3 pin coil ,top wire is earth - may be open circuit to ECU,if you put new coil in without testing earth it will FRY ecu 

Chrysler Neon

Cutting out, wont rev

Cam sensor connector full of oil. Replace.

Daewoo - Most model 1996 on

No start after fitting Engine/ Gearbox/ Starter motor   

Daewoo wiring loom near starter motor has a main ECU earth wire which bolts onto the block under the starter motor. This wire is black and will fit onto starter motor 12 volt feed from battery. Car will not start if this wire is fitted to s/motor - sends 12 volts down earth wire on crank. 'This is a common fault". Recheck the wiring loom to starter motor.

Daewoo Cielo/Lanos

Runs rough on 3cyls

Always check cam lobes no.3 exhaust worn out due to lack of oil + clean oil screen on pump.

Daewoo Lanos / Nubira

No spark, runs rough or no inj pulse

Faulty coil pack replace (common fault), Check power supply to coil pack

Daewoo Nubira

High idle

(common fault)

Try new idle motor, but has to be reprogrammed by Daewoo,try cleaning idle motor and pulling out plunger extra 15mm,refit and start car,hold at 4000rpm for 1 minute,should rest idle correctly

Diahatsu most models  to 1998

Surging, cutting out

Runs rough.

Water leaking on ECU wiring loom in front of centre console.

Diahatsu Charade/ Feroza

Cuts out, hard to start

Faulty coolant temp switch

Diahatsu Sirion

Wont start no injector pulse, no spark

Wrong or old engine oil, slowing crank signal to ECU. To check take spark plugs out & check injector pulse(motor winds over faster)

Diesel EFI

Runs rough

No power.

dirty injectors,bad fuel,pump  Sometimes it is air flow meter or hose to or from turbo split.

Ford Escape look at Mazda Tribute

Ford Courier/Bravo


Runs on 2 cylinders

Faulty ECU (Injector drive)


Fuel pump on and injectors on with keys out of car, fuel running out of air cleaner

Bad earth causing injectors and fuel pump to stay on via EFI relay switching on fuel pump relay. Check earth to block.

common fault

Ford Falcon EA-ED

Rough idle runs rich

Split map sensor vacuum hose at manifold or fuel press reg blocked or leaking.

Falcon EA-EL

Car will go to start then switch of when letting key off start

Missing Spout signal ot of distributor (no fault code).

Falcon EA-EL

No spark

Has injector pulse

To check if dizzy is faulty put inj noid light in coil plug & if it pulses dizzy ok. Replace coil.


No power

Cat blocked, injectors, low fuel flow or cam timing out 1 tooth (common fault)

EA-EL 6cyl

Surging/ pinging/ no power

Check timing/ if moving remove dizzy & check dizzy drive gear on dizzy cam - If worn R&R timing chain & replace dizzy cam. Major job (common fault)



H/Bal has moved causing vibration, ECU then cuts out cylinders to compensate. Check piston TDC to mark on pulley.(Common fault)

EB11- EL

Wont start

No injector pulse

Check interior light fuse. As this is power supply for smart lock.


Immoboliser signal


Check pin 4 at ECU with scope, key on, will be square wave pattern.

(PIN 3 on EF-EL-XH)

EB11 - EL/ Early AU1


No start, has good signal from dizzy or crank sensor

Maybe smartlock ( can overide). Leave key on for 40 minutes. If it starts its a faulty immoboliser. Check interior light fuse first!


Key on Smartlock light flashing code 5


Voltage surge,check earths,Under charging battery


EF-AU1 Wont start,smartlock working -no codes

Starter motor working,but drawing to much current,check signal from crank sensor,if hashy signal replace starter motor or dirty crank sensor(covered in oil)or touching balancer



Stalling, erratic idle

Computer faulty


No start,no crank

Check 30 amp engine fuse,if blown air con compressor siezed,remove fan belt to confirm



High idle

Intake manifold gasket leak.


Cuts out

Hard to start

Crank sensor at H/Bal dirty (oil leak) Also H/Bal loose & hitting crank sensor.


Runs rough, rich

Fuel press reg in rail is blocked due to internals of rail rusting you must clean out or replace fuel rail. Before fitting new reg


No injector pulse on

 1 or 2 cylinders

Faulty coil pack


Stalling OR high idle when brakes applied


Fuel pump earth shares same earth as brake & reverse located RH front inner guard or check stop light switch


AU /BA ute or wagon Running rich or map sensor faults after fitting fuel pump ass

You have mixed up return and purge hoses on pump ass,sending fuel to purge valve ,and sucking fuel into manifold and covering map sensor-Note this is a common fault



Cam sensor code

or noise coming from cam sensor

Cam sensor shaft seizing,sounds like fan belts,replace cam dizzy drive

Common fault

BA/BF No Start,has spark and injection No fuel pump,beware as if car has hit a pothole or curb as like most late model cars has a Inertia switch fitted LH front near glove box has switched off .this is power supply to pump,just reset it-common fault

BA/BF 6 cyl


Coils (Replace all 6 coils)



No start cold


Bad earth or resin in ECU seperating. Try pouring hot water onto ECU. If it starts ECU is faulty.

BA    Stalling when D or R selected S7 soleniod behind trans pump faulty or loose causing lock up conv to come on at idle
BA 6 cyl

Runs on 4 cyls afterhard acceleration


Faulty variable cam  sensor mech,flush oil & put correct eng oil


BA   6&V8

Stalling, Surging

TPS code

Faulty throttle body assembly


BA 6 cyl

runs rich,code 02 sensor

Fuel rail rusty inside and blocking sreen on press reg,to cnfirm check fuel return to tank should be at least 1.0lt in 60 seconds if not replace or clean fuel rail + new press reg and 02 sensor (common fault)


No start, has injector pulse, no spark, no communication to ECU with scan tool.

Bad earth at battery.

Check all earths.

Ford BA/ BF 6cyl

High idle, surging. All TPS codes.

Intake manifold gasket leaking (Common fault).


No Triptronic function on auto. code selector range shift fault

Listen for buzzing noise from trans in park or neutral or light in cluster always shows trans in drive. fault is broken wire in harness under ABS module

BA/BF       Replacing HIM Module If you have problems coding new module,you must use FORD scan tool and go to Forced diagnosis process to programe HIM
BA/BF/ Territory Ign switch turning around or spring broken for return to ign you have to replace steering column-common fault
BA/BF GAS only Knock sensor code Beware as most gas vechiles do NOT have a knock sensor but scan tool will bring this up as it doesnt see a signal

Ford Explorer V6 up to 2000

Stalling/ lean ,O2 sensor fault codes

Intake manifold warped & sucking air into  intake ports. Replace bottom intake manifold (common fault)

Ford Focus                  

No power/fuel gauge codes

Faulty fuel pump ass.replace ASAP as it will damage dash cluster-$1100.00 from ford for dash + coding


Ford Focus

Surging,high idle

02 codes (lean) or no fault codes

Has split vacuum hose under manifold,throttle body,hard to see-R & R manifold and replace,can reuse orignal orings

NOTE-common fault

Ford Focus 2002 on manual trans

hard to start/surging

Vechile speed sensor out of range or faulty,to test VSS resistance should be 1.5 kohms between VSS signal out & ground pins at 3 pin connector

Ford Festiva

No start,no dash lights

Ign switch or check near battery tray for damaged wiring from spilled batt acid


Ford Laser KC/KH

Surging, cutting out

Runs rough.

Water leaking on ECU wiring loom in front of centre console.

Laser / Mazda 323 98/01 1.6 eng


No codes

Faulty coil. Change both coils & leads.

Laser / Mazda 323 98/01 1.6 eng

Runs rough, no power, no fault code.

Faulty airflow meter. Disconnect & drive to verify.

Laser/Mazda 323 98/01


Runs rough/surging no fault code

Knock sensor melted at back of engine

This is a COMMON fault

Laser / Mazda 323

with timing chain

Runs rough

Cam sensor code

Check cam timing / Tensioner loose will set cam code when timing out

Ford Mondeo

High rough idle

Check split vaccum hose under coils

Or at back of engine.

Ford Mondeo

Cutting out

Hard to start

Wiring loom loose at back of engine, wires melted to EGR pipes.

Ford Transit Diesel

Early models

Runs rough & no power

Usaully faulty fuel pump

Ford Transit Diesel late common rail

Motor surging or stalling EGR fault codes

EGR not faulty it is the switch for the EGR, common fault located near radiator has vacuum hoses going to EGR valve

Ford Transit 2.0LT

Diagnostic plug?

Where is it?

Hidden in fuse box, behind fuses LH Top side, pull out separate fuse panel.

Ford Transit Petrol 2.0LT


High idle


Usually Air flow/ Air intake tubes or EGR valve leaking.

(Common fault)

Ford Transit 2.0LT


O2 code


Check O2 fuse in separate fuse box RHF chassis rail.

Plus replace O2 sensor

Ford Transit 2.3LT



Faulty coils & leads,if misfire still there,check fault codes ,if ign driver fault present it has a faulty computer we can repair

Ford Transit 2000 on


No throttle response


Throttle pedal sensor  & throttle body out of range,to reset ewitch ign on,slowly depress acc pedal to full travel release slowly.this should reset system


Ford Territory No Start If oil light came on while driving,earth lead broken or loose between engine and chaasis rail
Terrirtoy AWD code c1280 This code is for YAW Sensor,replace,fitted behind pass air bag

Holden  Vectra

Cutting out, misfire (no fault codes)

Check wiring loom to crank sensor or faulty coil pack

TS Astra X18XE

Cuts out and stalling


Fuel pump relay supplies power to injectors,replace fuel pump relay

TS Astra

Crank code stuck or runs rough or wont rev

Sump has been hit and has damaged ring gear on crank for trigger signal. When replacing sump check ring gear!

TS Astra

Airflow code keeps coming up

Bad earth wire out of ECU to airflow meter. (Yellow wire)

Replace A/flow & add extra earth wire or repair /replace computer.

 TS Astra

Goes to idle, surging

Faulty throttle body assembly, faulty EGR Valve

TS Astra


Stalling, runs rough, check light on all the time.

(Check codes & repair items listed first)

Bad earth outputs out of ECU. We have to send ECU, key, reader away to be repaired,or replace computer

(Common Fault)

TS Astra    ABS Code-U2108 ABS module-cannot be repared with this fault code,must replace with new abs
TS Astra Code -Auto trans torque converter This code will come up if engine has slight misfire,could just be coilpack , check vacuum ports in throttle body may be blocked with carbon,if ports clean -faulty engine ECU
TS Astra z code-P1700 Still running rough or surging after fitting new ECU,make sure you clear transmission codes,if you dont it may be the problem ,if cleared and still running bad replace air flow meter as new ECU is not recieving the correct readings from air flow and check vacuum ports at back of throttle body blocked,clean

Barina SB late

Fans not working rad or interior

CODE -Quad control module-this code means relay-there are 3 relays behind battery (hard to find) these conrol fan operation-replace all 3

Barina SB Auto S Light on dash,code 93-in limp mode Reverse light fuse blown,common fault

XC Barina / Combo

Stalling & surging

EGR valve faulty (common fault),

Throttle body.

XC Barina/ Combo


Stalling, erratic idle

(Check codes & repair items listed first

Bad earth outputs out of ECU. We have to send ECU, immoboliser, key, reader & dash (speedo) away to be repaired. (Common fault),or replace computer,must be programed

 XC Barina/Combosurging,codes-purge control,02 sensors
 Check fuse 17 under bonnet-is 12volt supply to 02 sensors and purge valve-common fault
TK Barina Misfire CEL light flasing Code misfire sometimes Do compression test,exhaust valves carboned up bad,try cleaner through throttle body or head off,NOTE this is a common fault
VECTRA JS ABS light on -code U2108 can-bus no communication faulty abs module,cannot be repaired,must buy new abs module
Vectra JR/JS 4 cyl Stalling,codes air flow or MAF This is a COMMON fault-it is a faulty idle speed motor,when motor vechile stalls it brings up air flow codes


Hard to start cold

No signal from starter to pin 9, at ECU. Must see 8 volts + otherwise wont advance or richen (common fault)


Cuts out

Bad connection to dizzy, do wiggle test. Replace plug & crank sensor as moisture has gone into crank sensor (common fault).

Commodore VN/VY V6

Cuts out

Check codes, If cam & crank appear, it is a faulty coil pack.As this supplies voltage to both sensors. Replace coil pack & crank sensor.


Car cuts out after you let ignition key off

Missing spout (EST) signal to computer. Faulty coil pack assembly.

 Commodore VP/VR

Runs rough, hard to start

Fuel press reg sucking vapors & fuel into manifold via vacuum hose.


No start. Code 31  ( Check crank sensor & Coil pack are o.k)

Maybe BCM. (Can overide) Leave key on for 50 minutes. If it starts faulty BCM & key fob.


To reset BCM      

To reset BCM R&R Fuel pump fuse. If you have a problem with some functions not working try this. If it doesn't fix problem the BCM is faulty.


 O2 code even after fitting new O2 sensor

(02 not working)

Check earth circuit for both O2’s at ECU pins D14 & D16.

Bridge a wire to both earth outputs to rectify.



fans not coming on


This is a common fault,BCM runs low speed fan,eng ECU runs hi speed fan.may have bad earth at bolt near battery or wrong thermostat fitted,coolant temp switch,ECU,or relay (2 relays)


Faulty BCM

Check if cooling fan relay is correct,After market relay does not work correctly and will damage BCM(low speed fan operation)


No start or cutting out,has spark & injection but no fuel pressure

beware before changing fuel pump ass,check 12 volts to pump connection as could be fuel pump relay(switches of when hot)



Faulty coils (common fault)

Replace all coils.

VT-VY 5.7


Cam sensor code

R&R Manifold to replace sensor at back of valley.


O2 sensor codes

If new extractors fitted O2’s will fail in 2 days due to paint & sealant

VT-VY 5.7

Stalling, surging

Split hose at throttle body. Replace complete PVC hose kit.(Holden)


Dash lights on, fans on sometimes

Faulty ABS module

 VT-VYFans on all the time/no air con
 Code-BCM -output overload-fan or air con relay faulty


Cuts out, hard to start

Faulty wiring in fuel tank, replace fuel pump assembly or if losing spark - coil pack assembly.

VZ ,VE,Rodeo 3.6 v6 mifire codes ie ,cyls 1,,3,5 or other bank 2,4,6 Top of engine sludged up with oil,cam drivers are oil press operated and as oil pressure increases opens and closes ports on drivers to feed oil to convertors on camshafts and this increases and decreases advance ,if ports blocked cannot work,inspect and clean or replace cam drivers,note this is a common fault


Misfire. No fault codes.

Coils misfiring ( Common fault) replace.


Car wont start or runs worse after lifting manifold off

When you lift manifold off to check or replace coils or injectors it damages wiring loom to coils (gets brittle from heat). Replace loom kit to coils.You can get new loom kit from holden approx.$300

VZ-VE V6 Cam sensor codes BEWARE-test cam sensors,try swapping to get rid of code-Timing chain worn and cams are out of sync-replace timing chain kit major job-NOTE this is a common fault
VZ-VE /Rodeo V6

Misfire and or injector code after fitting coil


Faulty ECU not firing 1 injector,check with noid light,due to a faulty coil,the 4th wire on coil is a feedback to ECU so when a coil has a problem the ECU turns off injector to that cyl so raw fuel doesnt stuff up CAT-if coil has a short it damages inj driver in ECU.we have pre programed ECUs in stock-note common fault
 VE-V6       Fans on all the time Faulty fan or a/con relay
Frontera 1998 on Cuts out while driving or no start sometimes Wiring shorts out on metal retaining clip at firewall

Holden Jackaroo 3.2 & 3.5 Petrol

Surging & runs rich

Airflow meter, but usually O2 sensor faulty.

Holden Jackaroo 3.0

Turbo Diesel

Wont start after fitting new clutch assembly

Flywheel is in wrong position for crank sensor. You must mark flywheel first. As it fits on 8 ways

(Common fault).

Holden Jackaroo 3.0

Turbo Diesel 4X1 engine

Runs rough, No power!

If no codes (Dealer only)

BEWARE send to dealer! mainly seals on injectors or injectors blocked or leaking

$14000 for new engine.

Do not do head gasket!

Holden Rodeo V6 3.2

Hard to start

Cranks ok

Replace battery(common fault)

Losing voltage to ECU on start

 Rodeo 2.6

Hard to start - no fuel pressure

Check voltage to pump connector near fuel filter. Also main brown relay under bonnet.

Rodeo 2.2 C22ne runs rough,no start code-41-42-ign high voltage,computer or bad earth wire near alternator behind timing cover near head.this is a common fault

Rodeo 2.6

No spark

Hard to start

Check voltage to coil on crank, check brown relay, also fuse 9 under dash will have bad connection

(common fault)

Rodeo/Jackaroo 3.5

TPS Code constant

Replace TPS, if code keeps coming back, Check 02 sensor switching, If it has a faulty 02 it will bring up TPS code as circuit is part of fuel trim, try disconnecting 02 sensor to get rid of TPS code

Rodeo/ Jackaroo V6

2000 on

Runs rough on one bank after fitting heads or engine

Loom to o2 sensors on wrong bank ie. left hand loom going to right hand oxygen sensor. Wiring loom reads different to both o2 sensors, cuts injection duration to one bank

Holden Viva 05 on

Runs rough after fitting head or battery disconnected, Check light on   Code-Engine misfire

Computer lost memory for cam timing, Software has to be reprogramed by Holden dealer. NOTE - This is a common fault.


most models to 1999

No fuel pressure or spark

Check 12volts to pump/or dizzy, If no voltage main relay (8 pin plug under dash) Faulty- resolder board or replace(common fault)

Honda CRV Noise in rear,sound like wheel bearing Noise is from wrong diff oil,Honda has new grade diff oil,common fault

Hyundai - 4cyl / V6 1996 on with Crank angle sensor behind timing belt.

Runs rough. Crank sensor code (Not always). Crank sensor is behind timing belt.

Timing belt out 1 tooth or crank sensor oil soaked or C.A.S disc plate loose behind crank timing belt pulley (common fault).

 Hyn,models with crank sensor behind timing belt misfire,no codes check chopper plate behind belt for crank sensor not bent or loose


High idle-code for idle motor stuck on

check for 12 volts to plug for idle motor,if not there it has a blown fuse under bonnet

Accent High idle after fitting head or engine work TPS and ISC plug connectors on back to front  (they both fit) common fault
 Accent Running rich,02 codes Faulty purge control valve-sucking fuel into manifold,take off vacuum hose to manifold and check-common fault

Hyundai Excel

series 1 & 2

Runs rough.

No fault codes.

Faulty computer

Excel series 3/ Accent

Cuts out after 3 seconds from start   

Losing power to coil & injectors. Faulty EFI main relay or faulty ignition switch (worn)

Common fault

Excel Series 3

Cuts out / Hard to start. No fault codes

Faulty crank angle plug connector, replace plug kit & crank sensor.

Excel Series 3

Single cam

Runs rough & rich

Airflow meter on back to front (common fault)

Excel Series 3

Twin cam

Runs rough, surging

Faulty TPS or map sensor,check codes

Hyundai Grandeur V6

Surging, no power

Airflow meter faulty, disconnect to verify.

Hyundai Lantra 1.6 & 1.8 DOHC

Running rough, Bad idle. No Power

Cam timing may appear right, but use straight edge on cam marks. Tensioner not set right.

Jeep 6 cyl

TPS Codes

Check wires not broken at junction of fuel rail for TPS. Test voltages and earth at TPS, Do wiggle test at loom near injector rail                                                                        

Jeep Cherokee  6cyl


Vechile starts,runs for a few seconds and then cuts out


Body control does not recognise ignition key transponder,to reset,remove 50 AMP enscapulated fuse for 30 seconds,Fuse is located in engine fuse box (MUX/T-TOW) Refit fuse and vechile should start


Jeep Cherokee & Wrangler 94-00

Cutting out

Wont start

Crank sensor on flywheel faulty. Replace (common fault).OR Auto shut down relay faulty,if no power to coil,disconnect crank sensor,if power appears cas faulty

Jeep V6/V8 Crank sensor code We have found that vechile still cuts out and this code is still there after fitting crank sensor,but if you change CAM sensor as well it fixes problem,Crank sensor is located behind starter motor (remove starter)and cam sensor fits into manifold area

Kia Sportage

Cutting out

Wiring loom loose at back of head melting on EGR pipes

Kia Sportage

No injector pulse

Power to smart lock, check tail light fuse.

 Lexus IS350 Cam Timing/noise Variable Valve timing actuator-Beware- bolts break that holds housing and sprocket/will destroy engine
Mazda Tribute V6 Misfire codes coils,if code still there after fitting coils,repair coil drivers in ECU (we do heaps) if code and misfire still there do wiggle test at plug to ECU as wires get brittle near ECU

Mazda V6/ Telstar 2.5

No spark

Replace dizzy (common fault)

Also check fault codes- If crank sensor code, beware as some have separate crank sensor on front of engine (replace)

Mazda V6/ Telstar 2.5

Surging / Stalling

Check codes O2 sensors replace both (common fault)

 Mercedes 2006 0n V6 check light on-codes cam sensor Cams out of range,usaully cam timing out or worn cam belt/chain-major job

Mitsh all models 1996/on

Wont start, Immobiliser code. Has spark but no injector pulse.

Usually worn key. Immoboliser signal missing to ECU. Try spare key (common fault)

Magna TE/TF V6 with dizzy Crank angle sensor code BEWARE-crank sensor is not in dizzy(cam sensor is).crank sensor is at behind timing belt at crankshaft

Mitsh 1996 on 4cyl/ V6


Runs rough

Crank sensor code (not always)

Timing belt out 1 tooth or crank sensor oil soaked or C.A.S disc plate loose behind crank timing belt pulley (common fault)

Mitsh most models with immobiliser

no inj pulse but has spark

Wrong or worn key,immobiliser will lock and shut system down if constant no start-to reset switch ign on for 60 minutes then switch ign OFF for 5 minutes ,car should now restart

Mitsh Lancer CE


Speedo failure

Incorrect spark plugs!

Must use resistor plugs or will damage microprocessor on speedo circuit board.

Lancer/io pajero/ 1.8/2.0

no start after fitting engine or head

coil plug and crank sensor connector fitted on incorrectly (wrong way round) ,will fry computer

Lancer CE

Misfiring on 1 cyl,after repairs

Code 44

Because cam timing has been adjusted,sometimes code 44 will come up,to reset disconnect battery for 3 minutes,will fix problem

Mitsh Magna TE V6

Auto limp mode, Bangs into reverse gear

Check reverse light, if the fuse is blown it locks into limp mode

 Mitsh,models with crank sensor behind timing belt misfire-no fault codes check copper plate for crank sensor no loose or bent

Mitsh Magna TR / TS

Bad idle

I.S.C motor, computer or airflow meter.


Auto trans stuck in 3rd gear (limp mode)

Trans ECU faulty or TPS connection corroded


T.P.S Code stuck

Check green wire on end ECU plug. (Pulls out when pulling on ECU plug to change ECU).

TR/TS 4cyl

Cuts out, bad connection to dizzy. Do wiggle test.

Replace plug & dizzy. Check plug to TPS.

Common fault.

TS 4 &V6

No spark, has injector pulse or no earth to start relay

Late TS has immobiliser fitted behind ECU plate stops ignitor. To rectify rewire ignitor wire direct to ECU

Magne TE- TH V6

No idle after repairs or battery change or S light
 AWD light stuck on

This a common fault,as ECU loses memory,to reset- ign on,press mode button until beep is heard,display screen will show engine capacity,if not correct eng shown use trip computer up & down to set eng size,then press Mode button until beep is heard!this should reset idle

Magna/Pajero V6

Runs rough, surging, intermittent,No codes

O2 sensor faulty,disconnect to verify

 Pajero 3.5Misfire after changing coils
 Beware as ignition module behind throttle body,has dropped one coil.module-has 3 pin and 6 pin plug,to test swap coils to verify same cyl misfire

Mitsh Triton/ L300 2.4 with dizzy on cam cover



No power

Worn dizzy drive plate on front of cam, only wears 3mm but changes timing 20° both ways on cruise.

 Mitsh 380 02 codescheck all 02 sensors are working,this is a common fault and hard to fix-this sensors have a pulsing 12 volt signal out of ECU,if constat 12 volts or none,you can join wire near ECU to working 02

Nissan Bluebird

Runs rough

Cutting out

Oil in dizzy.

Replace dizzy

Nissan Exa 1.6-1.8 300Z /RB20/25

Misfire on 1 cylinder

Faulty ignition module, Replace.

Nissan Maxima V6 early model

Runs rough, cuts out surging

Water leaking onto ECU wiring in front of centre console (common fault)

Nissan Maxima A33-A34

Bad idle/ Stalling.

Idle motor fails due to water leaking into ISC  & then burns out idle circuit in ECU.

 Replace idle motor & repair ECU if burnt board.

Maxima A32/33/34 No start ,ECU smells burnt ECU board burnt due to electronic engine mount collapse, shorting out wiring,new ECU + engine mount,common fault

Nissan Patrol Turbo Diesel EFI

Wont rev

Airflow meter.

Disconnect to verify

Nissan Pathfinder/ Navara 3LT V6

Stalls after warm up or running lean or surging no fault codes

This is a common fault it is a faulty oxygen sensor switching incorrectly when warming up. Disconnect O2 sensor to verify.

Navara ZD30 Diesel Surging Air flow meter or inlet hose from turbo split
 Navara D40 2.5 stalling/no power 1st gear switch faulty
Late Navara V6 Misfire on 1 bank

Check voltage to coil packs (both banks) Must have battery ,if 6 or 8 volts it has a faulty ignition relay .there is a bank of relays located LH guard area.switch relays around to find faulty relay

NOTE-this is a common fault as Nissan recalled these vechiles to solve this problem

Nissan N16

No start or cutting out

This is a common fault,faulty cam or crank sensor-replace both as linked to same circuit in ECU (usaually no fault code)

Nissan Pulsar N15/ N16

Bad idle/ Stalling.

Idle motor fails due to water leaking into ISC  & then burns out idle circuit in ECU.

 Replace idle motor & repair ECU if burnt board.

Nissan N16

Crank or Cam sensor code stuck, stalling

Timing chain tensioner worn, or chain stretched. To check line up dots on cams, then measure tensioner piston protrusion, if it is over 10mm the chain is stretched!

Nissan N16 no power could be air flow sensor,blocked cat,sometimes blown stop lights or fuse will make car go into limp mode
 N16 no start after fitting new idle motor,or ECU faulty parts have blown ign fuse

Nissan N16 with VVT

Bad idle when hot

Check inlet cam VVT sensor, wont retard inlet cam when returns to idle. Change engine oil or replace VVT switch (No code)

Nissan Pulsar N14/15/16

Hard to start cold

No signal from starter motor to ECU wont advance or richen, must see 8volts plus at starter pin in ECU. Check start fuse in fuse panel (common fault)

Nissan X-Trail

Bad Idle after repairs or service

BEWARE-This is a common fault!do not clean throttle body,or disconnect t/body ,you must do relearn  procedure or replace t/body/ if still no better it has to go to nissan dealer for program upgrade or use  scan tool,we sell heaps of throttle bodys-beware!
X Trail Crank sensor or cam codes Replace both sensors,also if head or major work has been done and this code is stuck check you havent fiited power steer plug to crank sensor ,this is a common fault
 Corolla Avensis Auto shift problems/shuddering on take off Faulty ECU (we have in stock)-if left to long will burn out transmisson

Toyota all models

2006 on

Lost or damaged key


You have to replace key, barrel kit & computer costs $1500 to $2300.

Toyota Camry SVD10 4cyl

Cuts out

Hard to start

Plug in dizzy faulty to rectify replace dizzy.if map sensor code ,it will be a faulty computer

Toyota Camry V6 96-01



EGR Valve incorrectly switching, replace EGR sensor (common fault)

Camry /Corolla /Rav4(coil over plugs) 4cyl

Wont start or runs rough

Short in one coil sends voltage down earth wires to ECU. Disconnect 1 coil at a time to find faulty coil.

Rav 4 2003 on

Auto shift problems shuddering

ECU faulty (common fault) If left too long burns out end clutch in trans. we can supply programed ECU

 Rav 4/Tarago 2azfe 2.4
Throttle body codes after fitting t/body
 Check fuse 10amp pass side eng bay

Echo with variable cam timing

No power

Wrong or old engine oil causing VVS sensor not to move. Use oil flush & correct grade oil.If still no power the airflow meter is faulty(usually no fault code)

Common fault

Saab 84-96

No fuel pump supply

Check voltage to pump, if none ECU faulty, not switching relay (Common fault).

Saab 84-96

Surging, lack of power.

Airflow meter! Check fuel pressure & flow.

SAAB late model


One piece coil pack ass faulty-replace (common fault)

Subaru most models Check light on but when you check code -no trouble code,hard to start and cuts out at idle This is a COMMON fault.tell customer to bring car back when check light IS on,do not switch engine off,check code while motor is running,will bring up cam sensor out of phase,replace cam and crank sensor

Subaru 98 on

Wont start.

No injector pulse

Worn key (common fault)

Liberty Shudder and noise in gearbox when turning Put fuse into fuse holder under bonnet for RWD,this disengages RWD or repair gearbox

Subaru late

In limp mode,will change gears but no power,no cruise control

Check that brake lights are working. If brake light fuse blown will cause the vehicle to go into limp mode.

Liberty and others Fuel pump fuse blowing Disconnect pump and if still blowing fuse,check 02 wiring loom grounds out on exhaust.same fuse as fuel pump

Subaru late

Wont rev

Air flow meter faulty, disconnect to verify.

Subaru late


No codes

Faulty coil pack & change leads

(common fault)

Subaru 2004 on check and cruise light on dash,cruise not working fault code 02 sensor-when you replace front 02 sensor,cruise control will work again and both dash lights will be off?
Suzuki,most models Cuts out and hard to start sometimes,check light comes on but no fault codes Check codes when check light comes on WITH motor running,will bring up cam sensor out of phase,replace,NOTE this is a common fault,wont register code when you switch engine off

Volvo 84-96

No fuel pump supply

Check voltage to pump, if none ECU faulty, not switching relay (Common fault).

Volvo 84-96

Surging, lack of power.   

Airflow meter! Check fuel pressure & flow.

VW / Seat

Cutting out

No spark

Faulty coil. Test signal out of dizzy, replace pickup in dizzy & coil.

VW- Seat 1998 on

Bad idle, stalling

Electronic throttle body or vacuum leak.

VW/ Seat 1996 on

With coil over


Faulty Coils ( Common fault)

VW Transporter 2.0/2.5LT   

Cutting out, No start sometimes

Faulty EFI relay number 30 under the dash, it cuts power to pump or coil. Replace it & wiring loom under the intake manifold if corroded & bare wires touching.

Common fault

VW Transporter 2.0/2.5LT   

Hard to start cold,runs rich   

If previous tests done. I have found that coolant temp switch is faulty, check voltage