Cold start rpms bouncing
Thread Starter
Junior Member
Joined: Jul 2017
Posts: 21
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GLK 350
Cold start rpms bouncing
When I start my car, occasionally the rpm needle will bounce around maybe a few hundred rpm. It is fairly rough that you can feel the car rock when this happens. It doesn't always happen but whenwit does, it happens in the cold at first start. Any thoughts?
MBWorld Fanatic!
Joined: Jan 2009
Posts: 2,780
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From: Northern NJ
GLK 350 / Porsche 993
It almost sounds like some sort of idle control issue. Does CEL come on?
I've had misfires on very cold days last week (with CEL on), which would go away on restart. CEL is gone, too. Hasn't come back yet and no codes were stored.
I've had misfires on very cold days last week (with CEL on), which would go away on restart. CEL is gone, too. Hasn't come back yet and no codes were stored.
