Question about 1999 Buick LeSabre
I'm almost sure its not a direct trans problem since the acceleration from 0-40mph is smooth and easy.
I would want to know where the noise is coming from first.
If you had a cylinder not firing, you should get a check engine light with a trouble code stored in the computer.
It could be something hitting the exhaust pipes, a weak motor mount, or any number of other things.
Does it feel like it involves the fact you are at that speed, or the fact the engine is working very hard ?
Posted on Jan 23, 2013
Check the front motor mount bottom of engine.
Posted on Jan 26, 2013
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Posted on Jan 02, 2017
SOURCE: I have a 1997 Buick Lesabre Limited with a slight problem..I've replaced all three coils, new plugs and wires..The engine is a 3.8 V-6 series II..Upon acceleration, mostly, it shakes and hesitate
try some lucas fuel injector/fuel stabiliser
Posted on Sep 30, 2012
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