Question about 2002 Pontiac Grand Am

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2002 Pontiac Gran Am, rough idle and lopes when in gear and sitting still.

Sometimes has no power and slow accleration, and then will take off and run smooth. Untill you stop at a light and then it lopes and sometimes dies but usually restarts.

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: how do I change the fuel filter for a 2002 pontiac Gran Prix

Release the fuel pressure by loosening the gas cap, raise and support the car on jack stands,squeeze the plastic tabs on the male end of the connector,and pull the connector apart.Some models have 2 tabs,and others have 1 and the fuel line screwed into the other side.Remove filter mounting bolt,unhook tab from frame and remove filter. when you put in the new filter, make sure the arrow is pointing toward front of engine.On the line with plastic tabs, just push on till you hear a click, then pull on it to make sure it's latched.Don't forget to tighten gas cap.

Posted on Jan 24, 2009

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SOURCE: Rough Idle and then the veh cuts off

Have you tried cleaning the mass air flow sensor ? Use Qtip and carb cleaner to remove any gunk on the two wires that strech across the inside.

Posted on Mar 20, 2009

  • 15 Answers

SOURCE: 2002 grand prix runs rough,dies service engine

sounds like you have a vacuum leak, check all the vacuum hoses and replace any broken or kinked ones, also check around the intake manifold gasket for leaks. any air leaks after the air flow meter creates 'un-metered' air which inturn will make the car run rough and stall, hope this helps

Posted on Apr 04, 2009

  • 454 Answers

SOURCE: How do replace heater core in 2002 Pontiac Gran Prix

i do believe you have to take the passengers side dash apart behind the glove compartment. go to autozone and get a manual or go to the library and check the chiltons manual. this is not an easy job. how bad is the leak? if its not bad these heater cores are made of all aluminum. i would buy a bottle of that radiator additive and see if that takes care of the problem first. it only cost about 5 bucks a bottle and it may permanantly fix your problem.

Posted on Aug 13, 2009

  • 1 Answer

SOURCE: 2001 pontiac bonneville SSEi 3.8 l supercharged.

I have a 2000 Bonneville - I had a problem with the car stalling out - then it did not want to start back up. (When it did it would idle up and down and then die) I changed out the mass air flow sensor - now I have not had a problem. Good luck with it.

Posted on Mar 17, 2010

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1 Answer

Rough idle smooth accleration


Check your vacuum lines and be sure your throttle body is tightened down. Carb cleaner spray can be used to find the leak. Spray it around the lines and gaskets (while the engine is running). If the idle speeds up, you found the area of the vacuum leak and the solution to your problem, possibly.

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yes there is a trottle position sensor.
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Engine idles rough at red lights begins loping rpms drop to almost killing, then cycles back to normal, then repeats rough idle drop in rpms and loping, back and forth until I rev engine or take off


You could have a clogged fuel filter, if you haven't changed it in awhile. You could have a leak in the intake system somwhere also. When you slow down, you get less power to the engine. It may need spark plugs and wires as well, if in need for a tune up.

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since it sounds like this happens infrequently, you may want to check for something binding the accelerator pedal. ( wouldn't that be great if its that simple?) one can only hope...

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Once the car gets to op.temp it starts to run rough


it sounds like you might want to scan your vehicle for sensors evaluation to determine what causing your rough idle if you have engine light on

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