96 audi a4 2.8 no spark

40

Asked by Aug 23, 2016 at 02:50 PM about the 1996 Audi A4 2.8 Quattro

Question type: Maintenance & Repair

So i have a 96 audi a4 2.8 that has no spark, i have
replaced coil pack, plugs, wires and battery. Engine
turns but will not start. I have ordered the crank
position sensor but not sure thats the problem.
What could cause no spark?

24 Answers

63,335

On and Audi,could be bad crank sensor,but im thinking could be anti theft,or ECM issue,is engine light on?

40

Note:the vehicle started the day before it started to not start. It ran ok-ish but in the past it has had issues starting. The crank sensor is worn as if something was grinding it down.

2 out of 2 people think this is helpful.
63,335

OK,good to know this info,it just may be the crank sensor that is bad,but from what you said,you may need to check the harmonic balancer to,sounds like it may be bad wobbling causing it to grind agaisnt the harmonic pulley.

40

There is no check engine lights, when it ran there was no vibration in the engine. It didnt give me this issue until i replaced the serpentine belt. It acts as if it wants to start, but theres no combustion. I checked the fuel pump, it is functioning, i checked the injectors amd they are working. So im assuming its either a sensor or a bad ecm.

1 out of 1 people think this is helpful.
63,335

Have you checked the timeing belt?

40

The timing belt is good, it ran just fine before this issue. Ive replaced the coil pack and camshaft position sensor and still no luck,

1 out of 1 people think this is helpful.
63,335

Even thoe belt look,s good,may stiil have jumped time.

40

Timing belt is good, just replaced the crank sensor still no go. Although i did notice thT the cM sensor isnt putting out adequate voltage. Ive checked the continuity and got no signal. Voltage reads under 6 volts, reads under 2k ohms with sporadic jumps in numbers

63,335

Have you had the ECM checked?

40

No not yet, i dont have a reader.

240

Lol.... Find ur fuse box n should be located inside car driver side.... Find ignition fuse or something like that should be yellow 20 amp fuse check N replace it cause anytime u mess with coil or or spark plugs a bad coil harness could activate ur car safety mode which automatic blows ur ignition fuse up rather then blowing ur engine lol it is possible lmk know if u found it

240

Good luck

40

All fuses good, this didnt start until i replaced the battery

240

Engine management fuse #29#30 yellow 20 amp

240

Or could be tension pulley... Check ur tensioner pulley

1 out of 1 people think this is helpful.
40

I havent replaced the icm or cam shaft sensor yet. I have already checked timing components

240

Icm good thinking go with it good luck lmk how it went

40

Ive checked the wires going into the icm and theres a signal. I plug the icm in to the outgoing wire and check the output from the icm and got nothing, definitely thinking that its shot

240

Yup replace it.....

240

Howvit went

you need to read, set basic settings and do adaptations. it's $56.00 https://www.amazon.com/Xtool-Vag401-Diagnostic-Skoda- Vehicles/dp/B016IDXE78

40

Car ia running, it was the cam shaft sensor. Now im having a brake issue. The ABS is causing the rear tires to drag. Any ideas on how to disengage the ABS? Not a huge fan of ABS anyway seeing as i can brake in the snow the right way anyhow

240

Awesome I just replaced my camshaft sensor too but now rough idle on low rpm maybe boost leak/compression.... cylinder 2 missfire

240

Maybe pull abs fuse out, that should work

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