problem starting my Audi S2 B3..ASP

[peter_jensen]

Question d.26/6-2007

I have problem starting my Audi S2 B3 (original ecu) when it is hot.

Measure the engine speed G28 sensor = +- 15V wave looks nice
Measure Reference sensor G4 sensor = +- 75V wave looks nice but is it not too high voltage?

Symptoms cranking:
The car will not start but bangs and the tachometer needle is jumping op and down (0-2000 rpm)
Sometimes it starts and all problems are gone.

Peter

[peter_jensen]

Is there really not anyone there can help ??

Is there really not anyone there can help ??

Thanx Peter

[s2dude]

Do you have vag com?
If not I would suggest buying it and running it to pull the fault codes off your car.
Im not sure if faulty knock sensor can do this but it could be possible

[peter_jensen]

Sorry I due not have vag com I will install the Vems controller in near future, I have read out the fail code by connecting a diode.

Is it possible to clear the fail cods other way?

I will try to disconnect the knock sensors
Any other solutions?


Thanx Peter

[4WheelDrifter]

Disconnect the battery or pull out the 'motor' fuses for ~30 seconds to clear the fault codes.

Vag-Com is overkill for a 3B IMHO.

See one of my previous posts for checking the codes here.

[peter_jensen]

Triad to swab the two-vr sensors

Hi
Triad to swab the two-vr sensors then the car started fore 2 sec. 2 times and went total dead.
Maybe I frayed the ecu input because of the high voltage (+-75V) we measured yesterday.

Anyone have a b3 ecu fore sell ?

[peter_jensen]

juuuuuuuhhhhhiiii
When I swab the vr sensor and turned the disruptor 2 mm the car started.

I think that one of the vr sensors I bad condition

Thsnx for all the help