Where should rpm needle be when I'm just sitting

Asked by anduea Jul 31, 2015 at 10:35 PM about the 2009 Chevrolet Cobalt LS Sedan FWD

Question type: General

Just wondering really. It's above 1.

4 Answers
215

Mark answered 9 years ago

I would expect it to be just below 1. However, the tachometer needle could be positioned a bit off and display higher RPMs than the engine is actually turning. Typically, GM cars idle at about 750-900 RPM depending on the load on the engine. If you think the engine sounds like it is running fast and/or you feel the vehicle lurch, jerk or shudder when the gear lever is moved into Reverse or Drive, the engine could indeed be idling faster than it should. If that is the case, I would be looking for a vacuum leak.

Mark helpful
9,815

schalk answered 9 years ago

LEAVE GAP FOR COLD START, IF ITS ABOUT 1 FOR A WHILE AND THEN DROP TO +- 600 IS NORMAL

Mark helpful

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