Question about 1997 Buick LeSabre

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I went to the store and my buick was running perfect. I got back in the car and started it and it sounds like the engine is misfiring the idle keeps going up n down rapidly. Plugs n wires are only a month old, help me please

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Hi this could be a few things but what you are describing sounds like either the MAF sensor is faulty, or that the MAP sensor has started playing up, do you have any error codes? have you got the engine management light on ( looks like a picture of a car on the dash ) you could actually take it to a garage and get them to put a diagnostic system on it they will tell you what is wrong with it...hope this helps

Posted on May 30, 2010

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Posted on Jan 02, 2017

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hey thanks for bringing me up to speed. ive been working on many other problems but with your great explanation i remember.
we need to check the compression on that cyl. and compare it to the compression on 2 other cylinders your choice.
but before you do this get a can of carb cleaner . and with the car idling spray around the intake manifold in the area of #6 cyl. what we are looking for is a small vacuum leak that would also act like this. with the engine idling and spraying around the intake the engines idle sould not change and if it does when you spray you have an intake leaking.
let me know how it turns out.
later
paul

Sep 22, 2008 | 1999 Buick LeSabre

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