86 5kcsq still stumbling when cold

[Stacy]

There is soot in the tips, but the car is chipped, and has always had soot
in the tips. I was thinking that maybe the cold start valve wasn't
working.....how long should it stay energized?  I will try unplugging the
CSV when the stumble occurs and see if there is any change.

-----Original Message-----
From: Robert Myers [mailto:Bob at chips-ur-s.com] 
Sent: Tuesday, October 04, 2005 3:48 PM
To: Stacy
Subject: Re: 86 5kcsq still stumbling when cold


Any sign of soot at/near the exhaust tips?  Could the cold start valve be 
sticking open resulting in a very rich mixture until the engine gets pretty 
warm?


At 06:32 PM 10/4/2005, you wrote:

>*This message was transferred with a trial version of CommuniGate(tm) Pro*
>I have sold my 86 5kcsq. The new owner is still having the same issue that
I
>had with it, that I posted here previously about.
>
>
>
>A quick refresher:
>
>
>
>Car starts fine, after about 30-45 seconds, the car will stumble and
>sometimes (usually) backfires slightly when taking off, it smoothes out
once
>the car is moving and above about 2k rpms, once the car reaches about 80%
of
>warmed up (which on this car, is the about 3mm to the left of center of the
>temp gauge) the problem pretty much goes away.
>
>
>
>What has been checked so far...
>
>
>
>Replaced crank case breather, replaced warm up regulator with a known good
>used one, checked for vaccum leaks at all the normal places on the MC1 (
>hoses at back of intake, between intake and head, turbo boots etc), new
>plugs, new airfilter, car runs fine otherwise, makes good boost, climate
>control works (sometimes a sign of a vac leak in that system)  Ran some
>magic mystery oil through the crankcase on the odd chance there was some
>sludging somewhere, no change.
>
>
>
>
>
>Any suggestions or ideas would be greatly appreciated.
>
>
>
>Thanks!!
>
>
>
>Stacy
>
>
>
>
>
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Bob
Http://Chips-Ur-S.com