Question about 2004 Buick LeSabre
Posted by Anonymous on
Yes, O2 sensor may sometimes lead to engine stalling. But also make sure that the MAF sensor is working properly. Better check for codes if the CEL is blinking.
Posted on Apr 25, 2013
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Posted on Jan 02, 2017
Get the codes checked. A bad mass air flow meter will do this. Also replace the fuel filter. Check for vacumn leaks too.
Posted on Dec 04, 2009
Testimonial: "Vacuum leak it was thanks to the plastic elbow on the PCV valve. It must have gotten brittle and was missing a good chunk. Cost under $4. Thanks."
It is a sign of a clogged convertor, but i happen to own the same car (with a series 2 3800) and had the same symtpoms going on when i bought if for the wife. Mine turned out to be a Exhaust Gas Recirculation Valve (EGR Valve).
To kind of get a feel for what is going on with the convertor, you can have someone help you but sitting in the drivers seat, with the car running. You go behind the car near the tail pipe. Now have the other person rev it up a little, not to much though. Put your hand but the tail pipe to see what kind of pressure the exhaust has. You can use another vehical to do the same thing to feel what things are supposed to feel like. If the convertor is plugged, the pressure of exhaust coming out will be a lot softer than it should be.
If after checking it as discribed above, if you feel it is plugged, grab a hammer, and bang the heck out of it. This will break up and loosen the clogged part without have to replace it.
There is no really good way to test a EGR vavle without a special computer. Replacing it however, does seem to me as the most likely repair for this vehical. It is located on the top of the drivers side of the motor. It look like a cylinder with a wire coming out of the cap, and is held on by 2 13mm nuts.
Posted on Mar 24, 2010
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