Originally Posted by Roni271
I've got two questions. 1) I've got a 96 Bonne that acts very strange after a warm start. The RPM flutters around 1500-2000, the check engine light comes on. After 15 seconds the RPMs go up to 3000 then down to about 1100 where the engine begins to run smooth again. This only happens unpon a warm statr-up.
With the engine off, pull the vacuum line off the fuel-pressure regulator on the fuel rail. If gas comes out, the regulator has a broken diaphragm and is leaking gas into the vacuum system. The symptoms you describe fit this problem (among others
) My '96 Trans Sport was doing the same thing. (Cold starts were always okay.)