Question about 1999 Oldsmobile Bravada

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My 1999 bravada has a miltiple misfire, how can i know what the problem is and how to fix it. code P0300 also a vacum leak, how can i find the leak. code P0180

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I would start with the multiple misfire - replace plugs and check wires if there are any.
The vacuum leak can be tough, but look for common failures, like broken or removed vacuum lines. Sometimes you can actually hear the leak. I don't know the particulars of this engine, but we have a leak on our olds in the plenum gasket (between the throttle body and the intake manifold) Found it by spraying carb cleaner around the area.

Posted on Sep 03, 2010

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Posted on Jan 02, 2017

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