Question about 1999 Pontiac Grand Am GT

1 Answer

Ok I Have a 1999 pontiac grand am gt coupe. i have an engine sputtering problem when i am driving but when the car is idle it is running fine. what might be my problem and how can i fix this?

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Pontiac Master
  • 4,977 Answers

You could have spark plugs that need changing or bad plug wires.the fuel injectors could be dirty not allowing enough fuel to be idle there isn`t enough load to cause a noticeable miss fire.

Posted on Apr 10, 2011


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

My 2000 Pontiac Grand Am has been sputtering for a while, it has trouble gaining speed and will miss several times while driving. Once the RPMs catch it will gain speed, but it still misses. My ABS light...

This may be totally off base but my 2002 Lesabre with the 3.8 litre engine was running like this and it was the ignition control module. It is under the coil packs. The engine would start ok and idle ok but run like heck when trying to drive it. Are you getting any codes? Mine was random misfiring. The ignition module was about $150 and relatively easy to replace. Make sure everything is clean when it goes back together.

I don't know why the abs and trac off lights are going on and off unless there is a short somewhere.

hope that helps. if not repost your problem.

Apr 05, 2011 | 2000 Pontiac Grand Am GT

1 Answer

My 1999 pontiac grand am(v6) runs fine till you go to get on the highway or have to go up a hill then the rpms go up the car starts to fluctuate(**** or sputter) really bad were I wonder if I will make it...

my first though is a plugged catalytic converter. This can be checked with a back pressure gauge or by dropping the exhaust where it bolts to the back manifold and then test driving to see if the power is restored.

The second that is a bad MAF sensor. It is located in the air snorkel between the throttle body and the air filter box. You can try unplugging it and see if it drives better.

Lastly it could be as simple as bad ignition wires, plugs, or a coil.

Is the check engine light on? If it is the stored codes would give you some direction to start.

Oct 12, 2010 | 1999 Pontiac Grand Am GT

1 Answer

1999 pontiac grand prix 3.1 starts great but sputters throttling

check tps sensor check idle air control valve or iacv for proper func

May 03, 2010 | 1999 Pontiac Grand Prix

1 Answer

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

Mar 23, 2009 | 1999 Pontiac Grand Am GT

1 Answer

99 pontaic grand am

sounds lie you might have an IAC valve problem

Mar 08, 2009 | 1999 Pontiac Grand Am GT

Not finding what you are looking for?
1999 Pontiac Grand Am GT Logo

226 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts


Level 3 Expert

76070 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8266 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides