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hi guys.
Have changed the fuel pump relay, cranck sensor, hall sensor and the mfts sensor today, and the car still wont start.
I´m getting no fault codes, so am ******** my self here.
Sparkplugs get wet but cant se a spark from any of the 5 cyl?
Any ideas?
Last edited by AUDIS2avant; 27 February 2009, 13:43.
Thanx m8.
Just checked all fuses and all ok.
I´m getting no spark what so ever, but suddenly when i was clening up i had taken the coils up and put 5 spark plugs in the coils, nr1 coil and the wgfv startet to go nuts and valve clicked constantly and nr 1 coil started to fire????
Maybe my ecu is dead then?
Have you tried doing output tests yet - thats a good indication that ECU is basically sane and can communicate some outputs.
You really need an oscilliscope to test if the ECU is receiving the right signals - and that it is trying to send primary voltage to the POS.
With an LED tester you can verify presence of pulses at G40 and the injectors but it tells you so little compared to a 'scope.
There's honestly not that many things which will cause a no-start. The really tricky ones are fractures in the wiring loom and/or bad contacts - you need a breakout box and lots of patience in those situations. Even if you have to hire a scope it would be worthwhile...
I do have on sunday?
Can i make it trigger the coils and injectors? just so i can se the wire´s are ok?
I need a 5v led tester really, but am getting 5v to the hall sensor so guess that is ok then.
Just checked all fuses and all ok.
I´m getting no spark what so ever, but suddenly when i was clening up i had taken the coils up and put 5 spark plugs in the coils, nr1 coil and the wgfv startet to go nuts and valve clicked constantly and nr 1 coil started to fire????
Maybe my ecu is dead then?
Does there look like there has been water in the fusebox or a water leak down beside the passengers footwell? as with all these different things getting power would indicate something is giving a live feed to them (as in shorting out )
Hmm nothing from engine side, but my front window has been leaking a bit in the left side but the water did only reach the seat (dripping) but can it go up to the fuses from the back???
Wouldent it blow a fuse or somat?
Your left side is drivers side - thats where the auxiliary fusebox is - check it out for nice clean and dry contacts... Hopefully water hasn't made it into the loom.
With VAGCOM you run the output tests and it covers WGFV, EVAP, ISV and the injectors - not in that order... The tests are sequenced by opening / closing the throttle when prompted on screen.
Ignition switch at the back of the barrel were the key inputs...As you say the problem has got worse this is a classic trend for ignition switch fault as the internals of the switch break down causing loads of faults which are not picked up by vag.com
There is a few seconds 'whirring noise' when you 1st turn ignition key ON - this is often thought to be the fuel pump being 'primed' - thats what you get on K-Jetronic dinoasaurs but not Motronic... That noise is actually the afterrun water pump getting tested by the ECU before the engine is started.
If you don't have a voltage tester, then wire up a low wattage 12V bulb (like 5W sidelight) across the terminals of the fuel pump wires to make sure it gets lit up when cranking.
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