CGT fuel problem suddenly super rich then dead

[Ti Kan]

Stpndsmnn at aol.com writes:
> Was driving around today and suddenly my car started to lose power terribly.
> It would sputter and cough but not make enough power to move the car from a
> stop and would hardly rev.  Really muddy idle and I had to keep my foot on
> the throttle to keep it running.  Then suddenly it would be okay for a few
> miles and then the problem would return.  I went through nearly a 1/4 tank in
> about 15 mins!
> ...
> This is on an '83 CGT with a K-jet lambda system,  No CIS-e or eIII..

Assuming that your fuel and ignition systems are basically in tune
(i.e., CO, idle and timing are properly adjusted, rather than relying
on lambda feedback to keep a grossly out-of-whack system in check),
and that there are no bad air leaks in the intake system.

Are all electrical connectors on fuel system components making good
reliable contact?  Sudden changes of this sort seem to me like
electrical contact issues.  In particular, check the connector for
the frequency valve and the ECU connector itself.

Another possibility is that the oxygen sensor is intermittently
giving a false "lean" reading, causing the control unit to go rich.

-Ti
2003 A4 1.8T multitronic
2001 S4 biturbo 6-sp
1984 5000S turbo
1980 4000 2.0 5-sp
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    ///  Ti Kan                Vorsprung durch Technik
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