MAC11 help needed

[Ben Swann]

Huw - how familiar are you with timing the 5000 turbo quattros?  AFAIK the timing is
fixed and not changeable without installing a modified chip.  The distributor is either
"in-window" or not.  There are some cases where the Hall distributor can be on the edge
of adjustment, but if all was done in accord with timing belt adjustment and hall
adjustment per Bentley, then rule out timing.  Misfire perhaps due to bad parts, but you
can't adjust timing on the 5kt/200 and most of the other "later" engines that use single
window hall distributor and two flywheel sensors.

Ben 

-----Original Message-----
From: Huw Powell [mailto:one at humanspeakers.com] 
Sent: Monday, September 01, 2008 11:12 PM
To: Ben Swann
Cc: rhouck at neo.rr.com; quattro at audifans.com
Subject: Re: MAC11 help needed



> That sounds like a bad signal from the O2 sensor - your mixture is 
> off.  Timing should not be a problem unless pushing the envolope of 
> performance - that is not happening at low boost and RPM.

Actually, timing issues raise their ugly head in "normal" operation. 
What I read of the problem sounded *exactly* like timing issues.  I only wish I had an
idea or suggestion of how to approach the problem.

Oh, wait, I do!  Timing light... hook it up and see what you're getting. 
  You can do a careful "load test" (rev engine against brakes) to see what's up, but
please try to avoid the Darwin Awards.

--
Huw Powell

http://www.humanspeakers.com/

http://www.humanthoughts.org/