Engine Performance problem
1994 Saturn SL1 4 cyl Front Wheel Drive Automatic 130000 miles
Car is a 1994 Saturn SL-1 with 1.9L 4cyl TBI
Sorry for the long question, I do my own maintenance and it takes awhile to get me stumped sometimes.
Car has been running great for the past 5 years. I keep up on routine maintenance and that sort of thing. Replaced plugs, wires, PCV, coolant temp sensor and air filter as a tune up last month, car ran great afterwards getting 34mpg. Just last week, however, the waterpump started leaking badly and I think the thermostat was stuck open because the temp would never get past 1/8 on the gauge. After flushing the system, installing a new thermostat and pump, the cooling system works great but the motor misfires around 1500-2000rpm ONCE WARMED UP. Car runs great while cold (first 5-10 minutes). I've already eliminated so many of the variables by that tune up last month. What could be causing this misfire? I guess the car never warmed up completely before changing the thermostat, so now I'm thinking that it might be a problem that has to do with a sensor. Ideas?
have the same problem?
Sunday, January 18th, 2009 AT 3:22 PM