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No start when cold... latest news and questions! 200

posted by  B.C. on  Fri Nov 21 09:22 CST 2003
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last visit: Wed Mar 28 22:28 CST 2012
[RELATED]

Cold starting means engine needs a richer than normal mixture. The ECT tells the ECU to shoot in more gas. BUT - if there is an air leak, that makes the mixture leaner, and makes cold start harder if at all.

Vacuum leaks can occur in the intake manifold gasket. One test is to use carb cleaner. With the engine running, spray around each manifold rail. Where there is a vacuum leak the cleaner will be sucked in and the engine speed will change.
Replacing the intake manifold gasket is not a big DIY job. The things attached to the manifold don't have to be removed, mostly.

Another spot to check is in the corrugations on the bottom of the main air inlet hose. I replaced that air hose on my 1988 at a cost of about $20 last year, aftermarket. Only when I got the old hose off could I see the hole in it. Couldn't even feel it with fingertips! Odds are your car is ready for a new hose, just based on age.

Good Luck,

Bob

:>)






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