ABH V8 problem

HI Svein,

can you please fill out the profile correctly? Location etc.

Concerning your problem:

a) What does the ECU fault memory tell you?
b) Check the ground connection of the exhaust and probably install a ground strap - still looks like the Lambda sensor doesn't operate correctly. Just unplug the sensor and test.

Bastian

i have updated profile a bit.

No fault codes now. I have changed lambda some months ago, before that i got a fault code for the lambda.
After changed, no fault codes.

Ps: before it was much engine problems.
But the wavelike acceleration is still there..

I will try to mount a ground strap near lambdasonde:-)
I have tried another lambda..

I had the same issue 2 years ago.
I have changed lamda and every thing get back to normal.
Don't use universal bosch sonde, buy dedicated.

I have exactly samelike problem, and it doesn't mutter if the rpm is 3000 or 6000 the wave is still there.
I think it is oxygen(lambda) sensor or it might be the air mass meter(or is it air volume meter).
Could anyone tell me some webstores where to find AMM's in reasonable price?(maybe order from Germany or UK or etc.) cause here in Finland the local markets give prices around 600 Euros.
Thanks

/Sam

Lambdasonde is a brand new orginal Bosch.
Tried to check it, 0,0 - 0,7 volt at 700-800rpm.
that is normal?

Also took a Compression test, 180-185psi at all 8 Cylinders.

Engine works best without the lambda connected (black-signal).
I got a tip about the 2 sensors at flywheel, what do you think?

PS: NO fault codes!

Think those two sensors aren't a problem, maybe the Hall Sensor (in your ignition distributor). Checked the grounding of your Lambda?

Bastian

i have mounted a ground strap at lambda earlier. There was no differents.
No fault codes as I say.

When i had a 86 Golf GTI 16V i changed the Hall Sensor because it did not start.

Do you know if its the same Hall Sensor in the V8 4,2 distributor?

I have just read this: http://www.audiv8.com/german/faq/faq_show.php?id=13325

As i can see this seems to be like my problem.
I have ordered a brand new distributor, 80GBP + shipping.

Hej Svein,

you would have been able to exchange the sensor without exchanging the whole distributor. Well, too late I guess (and easier that way).

Regards

Bastian

Yes i know that:-)
But the price difference was not big, and its brand new complete.

I have readed at some forum that the engine will change the ignition (6-7 degrees) if the G40 sensor is defective. And it will be slower,less responsive etc.

looking forward to see;)

Hej,

looking forward to your report!

Bastian

Just got a new distributor, but its wrong
This one is for a 5 cylinder engine.

So i have ordered a Pick up sensor that is Vehicle Compatibility with V8.

PPU2744- BOSCH 1237031339

Hi,

what are you going to do with the wrong distributor? Send it back? Why not taking the one from the V8 from Audi?

Regards

Bastian

im selling the wrong distributor.
I ordered a Distributor that was Vehicle Compatibility with Audi V8, but it was not..

So i just waiting for a pick up sensor/camshaft position.
Have changed one before in a distributor that look like the one in V8.
The hardest part is knocking out the splint

Hope it will be here in 3-4 days...