[urq] EFI + MAC-14 maxing ataround 5k RPM

Ben Swann benswann at verizon.net
Wed Oct 24 06:19:59 PDT 2007

I think that MAC-14 would have stored a code.  The last code I had was for the IAT - it
had shorted out inside the connector.  No codes have been stored since and I have the
system wired to do diagnostics to CEL with a switch.

You are right in that it is easy to overlook something more obvious or simple.  I do try
to rule out the basics long before posting, but I occasionally miss something that
should have been checked already.


-----Original Message-----
From: Quattrodude [mailto:quattrodude at comcast.net] 
Sent: Tuesday, October 23, 2007 11:38 PM
To: 'Ben Swann'; 'Cody Forbes'; quattro at audifans.com
Cc: urq at audifans.com
Subject: RE: [urq] EFI + MAC-14 maxing ataround 5k RPM

I know that I'm not an expert, but has anyone considered a possible bad
Knock sensor? That might be causing this? Could the RPMs at high revs maybe
making the sensor randomly report a knock and back off the timing etc?

That might explain the back and forth of RPMs even with no load?

Again I have no clue just tossing it out there as an idea? Sometimes people
do down one road and don't look at other things?

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