Question about 1992 Buick LeSabre

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1992 Buick rotten egg and rough idle in gear

Car runs really rough when in gear at a stoplight and smells of rotten eggs from the exhaust?

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REMOVE UPSTREAM 02 SENSOR INSTALL VACCUM/PRESURE GAUGE START VEHICLE IF THERE IS MORE THAN 1 PSI EXHAUST HAS A RESTRICTION, CAT/MUFFLER/COLASPED IN EXHAUST PIPE INTERNALLY

Posted on Oct 17, 2012

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Posted on Jan 02, 2017

gordanddar
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SOURCE: Car died rotton egg smell

Not sure if engine coolant smells like rotten egs when it burns inside the cylinders , but it sounds like you may have blown a head gasket. Coolant and/or oil could be getting inside combustion chamber. Another possibility is that the catyletic converter might have broken up and colapsed onto the screen where it goes into the exhaust. Might give the rotten egg smell and block the exhaust enough to cause backpressure sufficient to cause the engine to run poorly too.
Try putting your palm over the exhaust pipe , if the exhaust is coming out in pulses (pop ,pop,pop) thats normal , if it is just slowly flowing out with no noticable pulses , I would check into the cat converter problem.

Posted on May 07, 2009

greg_margo
  • 1959 Answers

SOURCE: Buick smells like rotten eggs and will not run

Sounds like a bad catalytic converter. If you were feeling a lot of heat under your feet while driving (before it stopped completely), this is one of the symptoms of a bad catalytic converter. The smell is sulphur backing up and not efficiently moving through your car's exhaust.

Posted on May 06, 2009

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SOURCE: My 2003 Buick Century will not start. I checked

Did you ever find out what is wrong with your car? I have the same car and same year and the same thing has happened to me..

Posted on Aug 30, 2010

redds55
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SOURCE: why does lacrosse idle rough

Sounds like you may have bad fuel pressure regulator

Posted on Nov 02, 2011

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Car died rotton egg smell


Not sure if engine coolant smells like rotten egs when it burns inside the cylinders , but it sounds like you may have blown a head gasket. Coolant and/or oil could be getting inside combustion chamber. Another possibility is that the catyletic converter might have broken up and colapsed onto the screen where it goes into the exhaust. Might give the rotten egg smell and block the exhaust enough to cause backpressure sufficient to cause the engine to run poorly too.
Try putting your palm over the exhaust pipe , if the exhaust is coming out in pulses (pop ,pop,pop) thats normal , if it is just slowly flowing out with no noticable pulses , I would check into the cat converter problem.

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