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Engine is shaking


MAD King
10-07-2011, 12:02 PM
Hello,

the engine of my 1998 3.1 Lumina is shaking or better idling rough when I stand on e.g. red light. Then it feels like I am on a boat at the sea. It swings. It is normal when I drive. What can this cause?

Thank you

jdl
10-07-2011, 12:06 PM
How long since a tune-up? Any applicable trouble codes? Clean the throttle body and idle air control. There are several issues that can cause rough idle.

MAD King
10-07-2011, 12:14 PM
Tune up was in January 2011 andall has been cleaned

jdl
10-07-2011, 01:30 PM
Maybe a vacuum leak, somewhere? Without something to point us in the right direction, all I can do is hunt and peck.

MAD King
10-07-2011, 05:14 PM
Maybe a vacuum leak, somewhere? Without something to point us in the right direction, all I can do is hunt and peck.

It might be. How can I detect the leak?

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