Why does your 92 Saturn SL2 idle so high at a stop or in park 1000 rpm in park is it the timing you had a new fuel filter fuel pump spark plugsIt is vibrating and shakes the steering wheel and dash?

If it idles high when you first stop and then slowly drops, I've found that replacing the PCV valves helps clear this up. I had this problem for a few weeks, my car idling high every time a slowed down and came to a stop. Following replacement of PCV, car runs much smoother and gas mileage improved by about 10%. ------------------------------ 1K rpm is NOT high for a cold start up. Normal operating rpms however should be near 800-900 rpms. You do NOT have a burnt valve since your car runs, just idles high. You more than likely do NOT have a vacum leak as they lead to 2-3K rpms at idle. Replace your Engine Coolant Temperature Sensor. Yours is stock and cracks sending bad datat to the PCM. PCM uses this sensor for idle rpms, air/fuel mixtures, and other systems. $17 at the dealer. Clean your throttle body including your IAC valve also.