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Old 11-25-2003, 08:35 AM
mattsuzie
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Trouble when idle / taking off (420 SEL)

On my 420 SEL, 230K miles, the car bumbles and shakes a little more than desired when the car is in drive and when I am stopped (like at a traffic light) and when I first hit the gas pedal. The trembling completely goes away after 10 mph.

Usually something like this has happened when I had a bad spark plug. I had all the wires and plugs replaced about 4 months ago for routine maintenance. About 2 weeks ago this trembling started and the mechanic could not figure it out. He replaced all of the spark plugs just to be sure yesterday for $105 and nothing has changed.

The tech's only other idea is the fuel injectors. He "leaned" out the fuel mixture a little bit, according to him, to try a cheap remedy, but it did not work, maybe a tiny bit, but nothing significant.

Does anyone have any ideas? Despite the mileage, the car runs pretty strong. This trembling is annoying and may cause engine damage if I do not address it. My only other option is to take it to a dealer and replace one of the fuel injectors? How to determine what the cause is?

Thanks.

Last edited by mattsuzie; 12-01-2003 at 12:02 PM.
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