Question about 2000 Buick LeSabre

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My 2000 Buick LeSabre 3.8 barley starts but when it start it runs rough how could I fix it and why is it running so rough?

I have changed the gas filter I have used a computer to look for codes and didn't find anything

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Check your ignition system. A good quality HEI tester is quite inexpensive

Posted on Dec 04, 2014

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Sounds like the plugs are not firing hot enough on initial start-up. Try a quick spark plug change, and clean throttle body. The gas being injected, isn't being burned fast enough by the plugs, which causes the car to have a hard start-up. You may try a higher octane gas or Lucas injector cleaner with your usual octane rating. Lucas comes in a very small bottle, and works very well in my opinion.

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2000 buick lesabre runs rough. It started running rough and the I drove it around for a while and it was okay for several weeks and then started running rough again and staying that way.


First I would change where I buy gas.And perform a tun up,start with the spark plugs,if it runs okay your done if not #2 change your wires.And clean your throttle body with carb cleaner.

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