Question about 1991 Chevrolet Lumina
I knew someone with a 92 Lumina who had the same problem and it turned out to be a bad fuel pump. If she has had the car for a long time and never had it changed, then it's definitely a good place to start. If the filter hasn't been changed in a while or possibly ever, then it should be changed. When it's a fuel related problem, it's usually worse when the engine is cold. If it's a catalytic converter problem, then it usually gets worse the longer you drive it.
Fuel system problems are usually checked with a fuel pressure gauge. the injectors must have a constant supply of fuel delivered at a certain pressure at all times for proper engine operation.
Catalytic converter problems can be checked by removing the converter and installing a test pipe. If the problem goes away, then the converter should be replaced. I hope this information has been helpful.
Posted on May 28, 2011
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Posted on Jan 02, 2017
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