[s-cars] Knock Sensors?
clancybill at yahoo.com
Tue May 24 19:59:39 EDT 2005
Does anyone know if there is a way to check the knock sensors? Or is there a way to disable them temporarily to see how the engine runs?
I continue to get inconsistent performance. It runs better with all the turbo leaks fixed and with new spark plugs... but I still feel the engine sort of sputter and back off a bit at WOT. It's been suggested that the ECU senses a knock and backs off the timing. I did do some road testing with the VAG-COM software on my laptop and I think I can correlate the power loss to the timing -- at WOT at @3500RPM the timing moved up to 12.8 BTDC, then it moved to 9.8 (I think that's the power loss I feel), and then back to 11 or 12. On a good run the timing seems to stay at 12.8. On a better run, sometimes I record 13 or higher.
I have another fuel/timing chip for 91 octane that Mr. Myers provided, but I am not yet convinced that the problem is knocking 91 octane fuel. Or maybe it is. Could it really be that simple?
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