no power
a4 1.8 adr has no power and also backfires at 2000rpm if i step on pedal.
What can cause this? |
Need more info. What does "adr" stand for? Any CEL or trouble codes? Any modifications to the car?
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It is most likely misfiring, not backfiring. Since it happens under load I suspect the coil packs or ICM have gone bad.
You should scan for codes so we can diagnose the problem. You can buy a VAGCOM cable on ebay for $5, or take it to a parts store to be scanned (if your state allows that, can't do it in CA.) |
I did vagcom scan and no trouble codes, also did datalogging and all was norrmal exept intake air temp sensor was 19,5 but i think early ones didnot have it.
3,5 g/s airflow at idle at load also logical,coolant temp sensor fine, lambda seeemd fine etc. ADR stand for engine code. I think 1 spark plug wire is not best but how do i check coil pack other than resistances? and ignition control how to check thatone? do i need to do oscilloscope tests primary coil wires? |
Ahh that's where I got lost, ADR isn't a US-spec engine code. Where are you located? That's a non-turbo petrol engine, right?
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yes , i am in europe , estonia
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Do you see a flashing check engine light when the car misfires or backfires? Seems odd there wouldn't be any codes or anything, that sounds like more than enough to upset the ECU
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gives this sometimes
1 Fault Found: 00561 - Mixture Adaptation 15-00 - Adaptation Limit (Add) Not Reached and thats it for now. |
if someone can explain please.
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so is it lambda is getting slow on updtes?
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