Problem Description and Possible Solution
A loose or corroded ground terminal on the driver's side of the cylinder head can cause a rough idle, misfires, and there may be trouble codes. Restore the ground to the cylinder head.
Problem DataRepairPal Verified
Average mileage: 141,626 (60,000–243,000)
Engines affected: 1.5L 4 Cylinder, 1.6L 4 Cylinder, 1.8L 4 Cylinder, 2.0L 4 Cylinder
14 model years affected: 1990
, more1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
33 people reported this problem
My woman's protege is having the p0300 code I changed the plugs and wires just for good measure but it didn't change anything I cleared the code and it started the rough idle and surging at highway speed pretty much around 45 mph . Gonna change the coil packs and clean the throttle body and MAF sensor hopefully it will clear this mess up.if you have any ideas let me know . Too many forums with useless info about this code .
Idles rough. Sometimes it will run rough when not at idle. Check engine light will periodically come on then go off after a while. I checked the spark plugs. They looked fine except the gaps were all off. I regapped and still had the same problem. Plug wires have been replaced recently as well as the valve cover gasket. I have also cleaned the MAP sensor several times which seemed to fix the problem initially.