[s-cars] Knock Sensors?

[Tom Mullane]

Bill,

Why not try a couple of gallons of toluene or some race gas to see if the
higher octane kills the alleged knock?

Tom


Date: Tue, 24 May 2005 16:59:23 -0700
From: "Bill Clancy" <clancybill at yahoo.com>
Subject: [s-cars] Knock Sensors?
To: <s-car-list at audifans.com>
Message-ID: <034d01c560bc$9bd2f8a0$6400a8c0 at TOSHIBA>
Content-Type: text/plain;	charset="iso-8859-1"


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?