I have 200,+ miles on the car. I change the plugs and wires yet it runs rough at idle and runs smooth at crusing speed. What can i do?
the engine runs at a faster rate than when the idle speed is lower.
Fuel injectors
your truck wont idle correctly when its cold, because its cold...and nothing runs correctly when it's cold. your truck wont idle correctly when its cold, because its cold...and nothing runs correctly when it's cold.
Check for a major vacuum leak.
More than likely it's your Idle Control Valve.
30 or 40 weight oil should be used.
My 89 jeep Cherokee surges at idle and sometimes stalls but runs fine once you are going what could cause this?
yes it runs off vaccum from the engine, it only works when the car is at cruising speed, not at idle or flat foot.
check the pcv valve and hoses if there is a vacuum leak here it wont idle
you need the fast idle adjusted on the engine you may have idle set where it sounds fine in idle but not high enuff when dropped in gear.
Until it overheats, runs out of oil or gas, or has a mechanical failure.