1998 Buick Century engine shakes

1998 BUICK CENTURY
200,000 MILES • 4 CYL • AUTOMATIC
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LUKPEYGAV3
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  • 1 POST
When idling, engine shakes very badly, like a wash machine would with a heavy unbalanced load. If I accelerate, the engine works great. If I put car in neutral, shaking is minimal.If In neutral and giving it gas, no shake or little shake is experienced
Jun 17, 2015 at 10:59 AM
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JDL
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  • 16,098 POSTS
How long since a tune-up? Any applicable trouble codes? To check codes yourself, you need an obd2 code reader. Some of the national brand autostores will check codes for free.

The basics for a rough idle is to check for a leak of some kind, fuel--egr--vacuum leak. When the vehicle is in park or neutral, not much load on the engine.
Jun 17, 2015 at 11:20 AM