Question about 2002 Pontiac Grand Prix

1 Answer

When accelerating, it hesitates and takes forever to speed up. When it gets up to about 40 mph, it starts shaking. Sometimes, it surges and chugs. Do not have power to overtake anyone and service engine light comes on. Help..

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Pontiac Master
  • 5,332 Answers

Sounds like you may have a plugged catalytic converter. The easiest thing you can do yourself is unbolt the exhaust from the rear manifold. Test drive it with the exhaust unbolted. If the power is restored replace the cat.

You can also try unplugging the MAF sensor and see if it drives any better.

Reading the codes that have triggered the check engine light would be a good place to start as well. Knowing what codes are present will help steer you in the right direction a little faster.

Posted on Nov 11, 2010

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:

2 Answers

This engine has a surge; AT 35-45mph,it's a bit more prounounced, not as bad, but still there at 60mph. As the tach goes up some, then down, so does the motor, up then back down, etc.Any ideas?


About 73,200 results (0.82 seconds) Search Results

    Surging While Driving Between 40 and 50 MPH : Chrysler ...

    repairpal.com > Problems > Chrysler > Town & Country
    Around 35 mph (common street speeds) the engine will sometimes surge with noticeable tach fluctuations. ... I have a surge when coasting around 40-45 mph.

    Enginge surges RPMS drop while driving [Archive] - Chevy ...

    forums.trailvoy.com > ... > OEM Issues

    Mar 17, 2012 - 19 posts - ‎7 authors
    [Archive] Enginge surges RPMS drop while driving OEM Issues. ... I so hope somebody has a clue as to what is causing my '02 Envoy's (182k) engine to ... I'll be driving and when I get up to around 35 - 45 MPH sometimes my ...

    Hesitation and bucking on acceleration - F150online Forums

    www.f150online.com/...engines/476391-hesitation-bucking-acceleration....

Feb 09, 2016 | Cars & Trucks

1 Answer

Engine V6 is hesitating when accelerating over 40 mph


Burn ignition coil get the car pass on a scanner im sure you get a misfire code

Mar 16, 2015 | 2008 Ford Escape

1 Answer

1997 Oldsmobile Achieva - check engine light is on and car is running sluggishly...brand new motor installed 6 weeks ago.


What speed are you going when it chugs?
It could be as simple as a bad spark plug or a spark plug wire/boot grounding out.
When spark plug boots get old, the rubber cracks and lets voltage arc out the side and to the engine instead of through the plug.
This will be most noticeable when trying to maintain a speed of over 40 mph, or under mild acceleration.
The reason for being noticeable at this speed/acceleration level is that the transmission torque converter will be locked, transferring the vibration from any engine miss straight through to the wheels.

Jan 07, 2012 | 1997 Oldsmobile Achieva

3 Answers

1996 Astro AWD 4.3L V6 308,000Km engine hesitation/surging


tsb remove dist cap ,clean out breather holes i replaced cap and rotor at the same time. chevy has the problem with the 4.3l astro,s and blazer i have both.fixed the problem when buying the cap and rotor the directions inside will also tell you how to fix

Nov 23, 2009 | 1997 Chevrolet Astro

1 Answer

Surges or bucks at steady speed, 40 to 50 mph


change fuel filter have injection system cleaned

Mar 11, 2009 | 1996 Chevrolet S-10 Pickup

1 Answer

Shakes side to side at


what you describe may be castor wobble and is from incorrect wheel alignment
check the steering tie rod ball joints and other suspension items

Apr 07, 2017 | Buick LeSabre Cars & Trucks

3 Answers

Honda crv transmission?


if your trans fluid is full it may be an internal problem in the gearbox even in the converter its hard to diagnose without seeing the car but i can sure try to help if you can add any other noises or symptoms i will see if i can help you pinpoint the problem

May 16, 2008 | 2005 Honda CR-V

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

369 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

yadayada
yadayada

Level 3 Expert

74896 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7688 Answers

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

Answer questions

Manuals & User Guides

Loading...