vr v6 commo wont start no spark
started car it ran for a min then died and wouldnt start so i changed the ecu, changed dfi module,changed coil packs, changed crank angle sensor, changed cam sensor, changed ht leads, still wont start, checked and no spark. fuel pump working fine plenty of fuel. its got me totally stumped, please help
Cars cost too much.
Does it attempt to turn over?
Check the negetive wire on the battery terminal.
it turns over fine but dont start
Last edited by stokedindustries; 13-08-2011 at 03:35 PM.
Cars cost too much.
Check the batteries voltage.
Might not be enough to spark the leads.
check imoberliser key might be flat if so you just wasted alot of money
Only had the key for 12 months it still activates the central locking and the imobiliser light turns off when the key is on. Im fresh out of ideas and the only thing i can think of that is left is the engine wiring harness. Any ideas????
injector pulse check that then move to spark
Gave up on VL's
Would not crank if that was the case..Originally Posted by shane_3800
Gave up on VL's
Which way are you checking for spark?
A silly way is to remove a lead from a coil and try and start it lol
I am a mechanic!!!! have pulled spark plug out of block and earthed it while cranking it and completely no spark!! The motor will not fire at all! This has me completely and utterly ripping my hair out!!!!!! Can anyone help??????
Well i am a auto electrician. Did you check the EFI relay?
Check if there is power getting into the DFI module the power wire would be the red one.
Also check for continuity from the crank angle sensor to the DFI module there should be no open circuit there. while your checking continuity check from ECU to DFI module
there are like 4 wires that go from the DFI module back to the ecu make sure there is no open circuit. were all the parts you changed brand new?
This is considering you checked all the fuses?
Good luck
Real cars are steel cars.
Can you get hold of a scan tool?
Crank it and look at the live data.
It has no spark, but does it have an injector pulse?
If I told you I was a compulsive liar, would you believe me?
ithink this is what my car is doing too an out come would be nice
that sound like could be starters or fuel pump problem?
Torana Addict
If it's cranking, it aint the starter.
Might be solved already but...
A fault that causes no spark on the primary side will also mean no injector pulse and the fuel pump on only initially. This is because the PCM needs to "see" an rpm signal from the DFI before it fires the injectors and keeps the fuel pump running. i.e. check spark first from each of the coils (only one wire is needed because both ends of each coil always fire together).
There will be spark (normally) without the PCM, BCM or cam sensor. All that is required is the CAS and the DFI, at least one operating coil and that the wiring between them is intact (and a rotating engine).
There does need to be power to the CAS which is via the DFI. I'd start there, checking for power to the CAS, the earth and that the two signals are switching as the crank is rotated. Jumper wires to power and a test light will do it, made easier with a plug and wires snipped from a wreck.
Damaged fins on the balancer might also stop the CAS signal.
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