Question about 2002 Pontiac Grand Prix

2 Answers

2002 grand prix

My car doesnt go over 40mph ive changed the fuel filter spark plugs and wires and the MAF what next. The car runs better when I unplug the MAF and the check engine light doesnt come on. HELP

Posted by on

  • 1 more comment 
  • dhauser101 Sep 03, 2008

    My 2002 Grand prix presently will not go over 45 mph. I have changed the spark plugs, spark plug wires, fuel filter. I also took it to Advance Auto and they put it on their machine and it did not show any codes. The check engine/service engine light does not come on. This started app. 2-3 months ago and at that time it would not go over 75 mph it has slowly over this time reduced to now only going 45 mph. What do you think?

  • Anonymous Nov 20, 2008

    I am having this same problem....yet now that I have kept trying to drive it somehow the brake lights and blinkers will not work...not to mention the windows.

  • Anonymous Nov 24, 2008

    This happened to me a couple of month ago. It was the catalytic converter, about 250 to replace and seemed like a brand new car when replaced!

×

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 26 Answers

It was the Cat. Converter on mine, Don't drive it like that too long as it will send exhaust back through the EGR Valve and burn a hole in the Intake Plenum....

Posted on Jan 31, 2009

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

I just had the same problem. Check the catalytic converter. It took me forever to get over 30 or 40. Drove everyone in the road nuts. They initially thought it was the transmission. Not so, clogged catalytic converter. I got it tuned up and the engine runs fine. Wish I could sasy that about everything else on this lemon!

Posted on Sep 02, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
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.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

04 Grand Prix Cut out / Hesitation on acceleration between 2k and 3k rpms but not at WoT. MAF replaced, plugs, wires, o2 sensor (rear), Cat tested @500 degrees on output, throttle body replaced, unplug...


Check for a vacuum or air leak. Possibly a hose or intake manifold. Odd that it runs better on default MAF settings with MAF unplugged, but if no codes indicating a circuit problem, IDK. Could be a vacuum leak.

Feb 23, 2014 | 2004 Pontiac Grand Prix

2 Answers

My 2001 grad prix stumbels at acceleration once in awhile and in park sometimes there is no engine codes and i've changed pretty much everything plugs wires coils fuel filter and i even cleaned th


You did oxygen sensors at 100,000 miles

No exhaust leaks

No intake or evap leaks

Changing parts doesn't answer the question
Do you have ignition misfires

Egr problems

Mar 13, 2013 | 2000 Pontiac Grand Prix

1 Answer

Will not idle, have replaced fuel filter, plugs, maf sensor what next?


you need a idle air control valve it is on the throttle body next to the throttle position sensor

Nov 11, 2012 | 2002 Pontiac Grand Prix

1 Answer

2002 grand prix, changed the MAF due to code, tried a TPS from a shops recommendation. Also replaced fuel filter, car still hesitates and acts like it has a wrong fuel air mix. The hesitation happens...


It makes me wonder if the new MAF sensor did not fix the problem in that circuit? Were the codes cleared after replacing it? And engine light stays off? Only way to know is have them or someone check for new codes again. The codes direct you to a circuit malfunction. That's why a new sensor doesn't always fix the problem.
It may be something else, but one place to start is have the codes read again. If, as you say, may be an air fuel mixture, you could have your fuel pressure checked to see if it is up to specs. At least eliminate that possibility. Good luck.

Nov 12, 2011 | 2002 Pontiac Grand Prix

2 Answers

96 grand prix se engine problems


Your problem may be a faulty (shorted) ignition coil housing assembly (the white plastic cover housing the coils its bolted to the aluminum cover) change that along with the spark plug boots ( the boots are optional but I recommend it) that should get your Grand Prix running smooth. Good luck and keep me posted, be glad to help

Jun 10, 2009 | 1996 Pontiac Grand Prix

2 Answers

1997 pontiac grand prix with major issues


check all fuses for turn signal and brake lights.change fuel filter . first. do a little tune up change spark plugs and wires . if changing fuel filter dont help. have fuel pressure check first before buying a new fuel pump .they run after taxes 400.00 dollars. your fuel pressure should be 41 to 47 psi. replace fuel pump relay also.

Mar 16, 2009 | 1997 Pontiac Grand Prix

2 Answers

2002 pontiac grand prix gtp running really rough and puttin


Do you have a check engine light on? Try driving it with the MAF unplugged.

Mar 14, 2009 | 2002 Pontiac Grand Prix

2 Answers

02 GRAND PRIX -VALVES CLATTER MISSES BAD NO ACCELERATION


It is your converter I had the same problem on my 2002 Grand Prix GTP...Danny

Nov 25, 2008 | 2002 Pontiac Grand Prix

Not finding what you are looking for?
2002 Pontiac Grand Prix Logo

421 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

yadayada
yadayada

Level 3 Expert

63990 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21990 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

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

Answer questions

Manuals & User Guides

Loading...