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1998 Grand Prix quits running


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01jerry03
New User

Aug 24, 2010, 10:34 AM

Post #1 of 5 (1610 views)
1998 Grand Prix quits running Sign In

1998 Grand Prix with supercharged engine. Car will start and run smoothly for about 5-10 minutes but then begins to run erratically and then shuts off. Problem started when radiator cracked and leaked. Thought engine was overheating but now radiator is fixed but still shuts off long before it gets HOT. Brother in law said his Monte Carlo would do the same thing (not supercharged) because of a Maximum oxygen sensor? Never heard of that.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 24, 2010, 10:43 AM

Post #2 of 5 (1606 views)
Re: 1998 Grand Prix quits running Sign In

An O/2 sensor will not make a car shut off. Does it start right back up? How good does itr run when it does?



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



01jerry03
New User

Aug 24, 2010, 1:15 PM

Post #3 of 5 (1597 views)
Re: 1998 Grand Prix quits running Sign In

runs really well for about 5-10 minutes but once it shuts off it will restart but sputters and misses badly


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 24, 2010, 1:18 PM

Post #4 of 5 (1595 views)
Re: 1998 Grand Prix quits running Sign In

The first thing I would check is the fuel pressure but you have to monitor it with a fuel pressure gauge when the problem occurs. It sounds like it's losing pressure.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



01jerry03
New User

Aug 24, 2010, 1:20 PM

Post #5 of 5 (1593 views)
Re: 1998 Grand Prix quits running Sign In

my bad, brother in law says it wa a mass air sensor






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