Question about 1998 Buick LeSabre
Hi, I would check for a vacume leak around your intake manifold #1 cylinder runner. You can check by using a stethescope with a small piece of brake line in the end of the hose or spraying propane around the intake. If you hit a vacume leak the RPM will drop. Vacume leakes normaly cause a higher RPM at idle.
Posted on Feb 01, 2010
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Leaking valve or head gasket leaking
Posted on Jan 31, 2010
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Posted on Jan 02, 2017
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