1991 Chevy Lumina seems to be flooding its self out.

Tiny
JXROCK78
  • MEMBER
  • 1991 CHEVROLET LUMINA
Engine Performance problem
1991 Chevy Lumina 6 cyl Front Wheel Drive Automatic 165k miles

I have a 91 lumina and it will stall while driving down the street or stop or in park I noticed when it does this there is black smoke which I am beleiving to be getting to much fuel, it only does the when its running funny engine lite comes on I jumped the connection to get code but dont get no code just the 12 code keeps going. I had same problums last summer with car no problums all winter even on long drives and stuff then warmer weather comes and gettin problums back I get a avg. Of about 18 miles a gallon also been sense I got the car fuel filter has been replaced also when it starts runnin like that when I am at like 50mph it kicks the rpms up to about 2200 from bout 1700 and and smells like gassy fumes can some one please help me I kinda like the car but even if I didnt I cant afford a new one at the moment. Thanx
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Friday, June 13th, 2008 AT 12:09 AM

3 Replies

Tiny
RASMATAZ
  • MEMBER
Check the fuel pressure and comeback with the readings we go from here-
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Friday, June 13th, 2008 AT 7:30 AM
Tiny
DNAPRORACING
  • MEMBER
I had similar problem. Black smoke when I got on the gas. Didnt happen all the time, once or twice a week tops. Was told it had to be fuel related due to the black smoke. New fuel pump, fuel filter, injection service done, fuel pressure tested, map sensor and lastly new o2 sensor "whole new fuel system". The black smoke continued. Finally got a full scan done on it and it turned out to be the ecm. The computer was telling the injectors to stay open too long. Replaced the computer,
been running fantastic ever since.
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Friday, June 13th, 2008 AT 9:42 AM
Tiny
JXROCK78
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Ok I got some codes now but I don't know if they have anything to really do with it 43 and 53 are the codes I am getting I blocked my egr up yesterday cuz I think it was junk and im not buying another one I was told it be ok any ways I didn't check the fuel pressure yet don't have the tool think I can rent from auto zone tho I looked them up 43 is the knock senser which I think is cuzed from when it runs rough and knocks around maybe?
Then 53 is system over-voltage (ecm over 17.7 volts)
which I have no clue about. I would think that I would get ecm error if it was the ecm wouldn't i.
I was also reading that is electronic spark timing or electronic spark control could that make car run rich.
I think it is in my spark then can someone tell me if I could be right I always like a sec opion
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Sunday, June 22nd, 2008 AT 11:14 PM

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