We have a 97 Sunfire with the 2.4 Quad 4. It has a very poor idle and stalls often.

The only code is a P0300 random misfire code.

Engine vacuum is quite low (12-13), but rises to about 16 or 17 at 2,000 RPM. We have a good vacuum drop to 0 - return to 20 i... Login to read more.