Questions & Answers for: Pontiac Sunfire 4k engine idle

...idle When the car heats up to normal temp the car idles very low and the engine starts to quiver. almost seems like the car is going to stall. Replaced spark plugs. Now check engine light is on. ...

...sure no hoses are disconnected, cracked or damaged. Disconnect each hose at the source on the engine and see if the engine idle stabilizes. Let me know what you find and we can go from there.

...it's idling. What else should we check? do a compression test of the cylinders, could be a burnt valve, from what you describe engine is missfiring on idle and running on all cylinders at higher ...

4k in neutral and accelerates on its own. This started out of no where a cpl days ago. I had some minor issues that no one seemed to think important, the check engine light is on always and comes back

...idle. Also it seems to come from the bottom of the engine. Help? if it gets louder and faster as the engine speed increases then a piston is knocking...if it is just at idle like you said then it ...

...at 1000. idle speed is controlled by the ecm, you may have a sensor or actuator problem and you need a scanner to check that right? and you can't check it if the engine light dosen't turn

...engine idle runs ok at highway speeds you don`t say if you have checked anything so start with the plugs for condition and age as well as plug gap.then the ignition wires they may need changing.the ...

...engine will not rev past idle. Hit the gas and it will only idle. Turn air off and 15 minutes later the car works fine just don't use the air. Its a 98 with 2.4 4speed auto. The check engine ...

...idle right i have 2 plugs on the wiring harness that go to back of engine i cant find where they go i got 2 plugs to the carb or throttle body 4 plugged in back of block and 1 down to catylitic ...

...idle air control valve Look for intake vacuum leaks. Sometimes running the engine at higher RPM , like on the highway, may clean it out. A fuel additive , in the tank , may also help. It is the ...