rough idling

[chrisusvi]

My 92 Tercel, on start up, runs rough for the first 15-20 seconds when I start the car in the morning. It eventually smooths out. It periodically does it when I come to a stop. I have changed the spark plugs and the distributor cap and wires, as well as, the pvc valve.

Is there something that I have missed that would make the the car run smoother all the time?

chrisusvi

[Tercel GTS]

Mine is doing the exact same thing. I'm going to try a fuel filter since I know it has 180,000 and is original. If that doesn't help I have a spare fuel pump to try. I'll tell you if I see any change.

[kamesama980]

small vacuum leak: 95% chance. its a pain to find em, but will cause rough idle, lack of power, bad braking in bad cases. those hoses should be checked and replaced with all others

[drehtwnftbl]

what you can do is spray some smoke-in-a-can into the engine compartment and look for where it moves...it's used for exhaust leaks too