geeze today i brought it over to my friends shop and he cant diagnose it!! ahh so annoying! he checked the sparks, wires, distributor, checked some sensors on the throttle body and everything seems fine...then it started to rain real bad so i left but like i said...its not a constant jerk it jerks then stops for 10-20 secs then jerks 2-4 times in a row then stops then 30secs later jerks again...something like that...and i notice it jerks the most while in drive and reverse and when the A/c is on but it does jerk a little w/out A/c. When it does jerk, i watch the RPM and it doesn't move much. stays around 6-700. the car never shuts off. transmission problem maybe?