hot start problems.

[Christina Tryon]

--
[ Picked text/plain from multipart/alternative ]
had similar problem w/our 90Q, turned out it was a collapsed crank vent hos=
e=2E when cool it would hold its shape but as soon as it warmed up it would=
 suck shut. throwing off the vacuum system.  if you find that this is the p=
roblem also check the intake boot to the throttle body where this connects =
(bottom connector on boot) it may have moved enough to tear the boot.  hope=
 this helps.  bill tryon
----- Original Message -----
From: Huw Powell
Sent: Thursday, April 04, 2002 5:13 PM
To: Jacob Behm
Cc: quattro at audifans.com
Subject: Re: hot start problems.



> 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=2E that the plugs and wires are all installed correctly (just for the
heck of it)
2=2E cap and rotor should have been done at the same time
3=2E intake manifold ground connections (and all other underhood
electrical connections...)
4=2E you already searched for vacuum leaks
5=2E make sure the OXS is working right (car runs fine til it is reading
OXS...)
6=2E 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/