Wow! This sounds a little spooky. The temp sensor on the engine would be the first place to start because the problem is temp related. Also check your wirring harness. If it is cracked inside of the coolant temp sensor, it could be sending the wrong info to the control module. This could also cause the problem....other things to look for are the camshaft sensor and the crank sensor. Why don't you register so I can e-mail you when I post to your question?
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[This message has been edited by Benzmac (edited 03-31-99).]