Question about 1999 Pontiac Grand Prix

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MY 1999 GRAND PRIX WITH 140,000 MILES RUNS GREAT ...BUT...OCASSIONALLY WILL CUT OFF WHILE DRIVING.. WILL RESTART IMMEDIATLY...???

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It might be a fuel pump problem or a clogged fuel filter.Another problem might be the coil pack is going bad.

Posted on Sep 10, 2010

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Posted on Jan 02, 2017

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97 grand prix rpm gauge/cuts out also


have you checked the fuel pressure. maybe a clogged fuel filter or a bad fuel pump

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How old are the spark plugs and wires. GM vehicles are great runners until something goes wrong with the typical spark or fuel delivery issues. Wires or fouled plugs may not set off the computer, it will just run crappy.

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My 1999 grand prix stalls and dies at stops.


My Pontiac Grand Prix is also a 99, it has 216,+ thousand miles on it, it runs great, idles good, I need to replace the oxygen sensor tho as it shuts off on me while driving or sometimes coming to a stop. You might try checking the fuel filter and pump as well.

Apr 17, 2010 | 1999 Pontiac Grand Prix

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1999 grand prix will sometimes start, then stalls


first i would check or replace the fuel filter. then check the fuel pressure at the fuel rail, and fuel pressure regulater. how many miles?

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I had this problem and I replaced the mass air flow sensor and it runs great, was told by my mechanic it is a hard problem to diagnose. I just unplugged the maf sensor and the car ran better so i replaced it.

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