2006 Pontiac Montana "rough idle" Questions

...montana ran rough at start up but smoothed out if you increased the idle for a few seconds. Now it runs rough all the time, almost like a misfiring cylinder. could be bad spark plug wires or ...

rough or eratic idle but at high speeds runs fine I believe that the sensor is mounted behind the crankshaft harmonic balancer. To me it sounds more like a TPS (throttle positioning sensor) switch has

pontiac montana backfiring exhaust glowing red, rough idle Check the MAS (mass airflow sensor), clean it, maybe it will help, but it could be a computer problem too

...rough at idle as well as normal driving? If you are lucky, it's just the spark plugs. Try replacing them and see if that makes it better. If that doesn't help, have the compression of the engine ...

...idle and the ride is rough. Went to mechanic for tune up..he changed the plug but not the wire problem persists kinda worst than before and sometime when accelerating, car feel that it gonna die or ...

...rough idle and idle vacuum is steady at 15 inches in Michigan (no altitude). I tried spraying carb cleaner around hoping I would see a jump in RPM at idle - no luck. If I had a vacuum diagram, it ...

...gas into the intake manifold to soon which at idle will cause the engine to either run real rough or to stall out.Some EGR valves can be taken off and clean the carbon out of it or you can replace

My van is idling rough at a complete stop in drive, put in fuel injector cleaner and it started running rougher. Service engine light came on, took it to autozone, they said it may be a vaccuum issue.

...rough at idle speed and at going speed, I think there's a vacuum leak. It could possibly be a vacuum leak, try replacing the Idle Air Control Valve about a $45 part.. Trace down the hose(s) that ...

van has a rough idle and it usually dies when slowing down or when at a complete stop? Is the check engine light on?