Engine Performance problem
1993 Plymouth Colt 4 cyl Front Wheel Drive Manual 70,000 miles
idle surges after warm up. Has repaired computer, new ISC, temp sensor, 02, fuel pressure regulator, all sensors test with in spec. Timing is good. New plugs, cap & rotor, fuel filter all vacuum hoses replaced. Starts fine, when it reaches operating temp starts to surge, between 1100 rpm & 1900 rpm. If the ISC motor is disconnected it will continue to surge. NO CODES! HELP!
Saturday, December 26th, 2009 AT 6:04 PM