hot start problems.

[Huw Powell]

> I really need some help on the one.  I have a 1988 Audi 90 Quattro.  The
> other night I changed the air filter, spark plugs and wires.  I did all
> this because it was running very poorly whenever the weather was wet.
> After I was done I started the car and it ran ok for about a minute.
> Then is started coughing and missing and finally stalled.  Once it's
> warmed up, it won't start.  It smells like it's burning very rich so I
> think it's an air problem.
>
> After reading some newsgroup posts, I ran across something about a cold
> start.  It seems to me like the cold start mode is running fine and when
> the car warms up to normal operation and cold start shuts off, the car
> dies.  Does that seem plausible???
>
> If so, where can I look for a problem?  I looked extensively for a
> vacuum leak to no avail.  What could I have dislodged or broken that
> would cause these symptoms?  It was working ok before the repairs.

Well, it wasn't really "working ok" before the repair.  It ran poorly
when it was wet out.

I'd check...

1. that the plugs and wires are all installed correctly (just for the
heck of it)
2. cap and rotor should have been done at the same time
3. intake manifold ground connections (and all other underhood
electrical connections...)
4. you already searched for vacuum leaks
5. make sure the OXS is working right (car runs fine til it is reading
OXS...)
6. lastly, make sure the static mixture is set right, it may have been
tweaked to "hide" a problem, and now it *is* the problem.

5 & 6 sorta go together...

--
Huw Powell

http://www.humanspeakers.com/

http://www.humanthoughts.org/