Question about 1998 Pontiac Grand Prix

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At 4000 rpm the motor cuts out shuts down but it runs smooth from800 to 3900 rpm and it has a rough idle.

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  • 24 Answers

Kind of sounds like low fuel pressure or bad ignition. Clean spark plugs, distributer, and fuel filter.

Posted on Jan 11, 2013

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Posted on Jan 02, 2017

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  • 750 Answers

SOURCE: rough idle at 700 rpm, cutting off once in a while.

check the IAC sensor, might be sticking

Posted on Aug 27, 2009

  • 1949 Answers

SOURCE: i replaced fuel pump aprox.

pres.reg.or TPS

Posted on Nov 27, 2010

  • 1 Answer

SOURCE: 2001Pontiac Grand Am Rough Idle In Drive Only

I had the same problem with '99 GA I changed the idle control valve , solve the problem

Posted on Dec 23, 2010

  • 78 Answers

SOURCE: 1995 bonny 3.8. car starts runs rough then dies.

maybe bad gas or gas filter check spark plugs and wires

Posted on Mar 30, 2011

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It's a safety issue. The computer is trying to save your engine and transmission. If there isn't a light, there still could be a code. It would be in history codes. It takes a scanner to retrieve them. Unless your a race car driver or doing 200 MPH all the time. The RPM's shouldn't stay at 4000 RPM's.

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http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

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Nissan Pathfinder Backfires? http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-backfires.html
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----------This will help.Thanks.

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