Lew, the first place to start tracking down this problem is to check
your idle speed with the Idle Stabilizer Valve (ISV) disconnected. Be
sure the engine is warm, shut it down, disconnect the ISV, then start it
again. Note the RPM. It should be around 850-900. If it is not, use the
big flat screw and adjust accordingly. Then check your timing. If the
timing is off, reset it, then readjust the idle speed. Let the engine
cool, re-connect the ISV, and start the engine. It should idle about
1000-1100 rom until it warms up then should drop to 850 or 900. If when
cold it still won't idle, you could have a vacumn leak or the ISV( round
cylinder thingy on top of the engine) or ISV Control ( a box behind the
right brake light). I had your problem, and it was a rotted crankcase
vent tube. (on top of the engine)

John Rodgers
88 GL Driver

Lew Sutphin wrote:
>
> Hello,
> I have a 91 Carat that starts up great and idles smooth
> for about 30 seconds - then immediately dies. It will
> restart, but unless the idle is kept up until the needle
> begins to move it will stall again. It will drive fine,
> until a stop sign, then die. Once it is warmed up it
> runs just fine. This problem got worse after a tune up.
> It used to cold idle without any help at all, but would
> stall as above at stop signs until warm. Any suggestions?
>
> Lew Sutphin
> 91 Carat
> Fort Collins CO