efi spares trade tips

CHECK THE BASICS FIRST!!!

 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.

PROBLEM CARS

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. Common fault.

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

MOST COMMON FAULTS

CAR	PROBLEM	DIAGNOSIS
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)
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	Misfire	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.	BEWARE usually pump problem cost up to $8,000.  Sometimes it is air flow meter or hose to or from turbo split.
Ford Courier/Bravo 92-98	Runs on 2 cylinders	Faulty ECU (Injector drive)
EA-EB CFI	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.
EA-EL	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)
EA-AU V8	Misfire	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.
EB11-ED-EF-EL-XG-XH	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 (Smartlock)	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!
EB-EL	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 sesor(covered in oil)or touching balancer
EF	Stalling, erratic idle	Computer faulty
EF/EL	No start,no crank	Check 30 amp engine fuse,if blown air con compressor siezed,remove fan belt to confirm
EF/ EL	High idle	Intake manifold gasket leak.
EF/AU1	Cuts out Hard to start	Crank sensor at H/Bal dirty (oil leak) Also H/Bal loose & hitting crank sensor.
AU	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
AU	No injector pulse on  1 or 2 cylinders	Faulty coil pack
AU	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 V8	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 6 cyl	Misfire	Coils (Replace all 6 coils)
BA	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 (Replace)
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)
BA/ BF	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).
BA/BF	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 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	Misfire 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 1.6/1.8	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	Stalling. High idle Surging	Usually Air flow/ Air intake tubes or EGR valve leaking. (Common fault)
Ford Transit 2.0LT Petrol	O2 code Surging	Check O2 fuse in separate fuse box RHF chassis rail. Plus replace O2 sensor
Ford Transit 2.3LT	Misfire	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
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 Code-Injectors	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 ,but mainly faulty engine ECU
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
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
VL-Skyline	Hard to start cold	No signal from starter to pin 9, at ECU. Must see 8 volts + otherwise wont advance or richen (common fault)
VL-Skyline	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.
VN-VY V6	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.
VR- VS	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.
VR-VT	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.
VS-VT V6	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.
VS	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)
VT	Faulty BCM	Check if cooling fan relay is correct,After market relay does not work correctly and will damage BCM(low speed fan operation)
VT-VX	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)
VT-VY 5.7 GENIII	Misfire	Faulty coils (common fault) Replace all coils.
VT-VY 5.7 GENIII	Cam sensor code	R&R Manifold to replace sensor at back of valley.
VT-VY 5.7 GENIII	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)
VT-VY	Dash lights on, fans on sometimes	Faulty ABS module
VT-VY	Cuts out, hard to start	Faulty wiring in fuel tank, replace fuel pump assembly or if losing spark - coil pack assembly.
VZ-VE V6	Misfire. No fault codes.	Coils misfiring ( Common fault) replace.
VZ- VE V6	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
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! $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 2.6	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.
Honda 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)
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).
Accent	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
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.
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 1996-2003	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 Magna TR / TS	Bad idle	I.S.C motor, computer or airflow meter.
TR / TS	Auto trans stuck in 3rd gear (limp mode)	Trans ECU faulty or TPS connection corroded
TR/TS	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 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
Mitsh Triton/ L300 2.4 with dizzy on cam cover	Surging, No power	Worn dizzy drive plate on front of cam, only wears 3mm but changes timing 20° both ways on cruise.
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
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
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,(auto-tech has this info) if still no better it has to go to nissan dealer for program upgrade or use hanatech scan toll,we sell heaps of throttle bodys-beware!
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	Surging Stalling	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. (Toyota has to recalibrate ECU)
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	misfire	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)
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	Misfire 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	Misfire	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