Question about 2002 Pontiac Grand Prix

2 Answers

The car shakes really bad about 40-50 mph but when you release the gas pedal, it runs smooth, only when you hold the gas pedal down it shakes bad at around this mph. its not the tires. They are all new and balanced. possibly a clogged fuel injector? please help!

Posted by on

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 10,319 Answers

You are apply torque to the engine upon pushing on the gas pedal so the law of nature states the engine mount maybe broken

Posted on Feb 03, 2010

Ad
  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 10 Answers

Sounds Like An Out Of Balance CV Shaft Or Shaft Not Locked Fully Into Transmission, Check That First. When Installed A Metal Ring Keeper At End Of CV Shaft Should Snap Into Transmission When Fully Inserted, Have Seen This Problem Before. Then Check Tie Rod Ends, Weight Off Of Front Tires, Move Tire Side To Side While Watching Tie Rod, If Tie Rod Is Loose & Moves Without Moving Steering Arm, Replace. My Opinion, If You Know Nothing About The Vehicle, Or Bought It Used, Replace Tie Rod Ends & Ball Joints, BOTH SIDES, If One Is Failing, The Other Side Is Probably Very Close Also.

Posted on Jul 15, 2013

  • Thor68372rockon Jul 15, 2013

    Also, Check Motor & Transmission Mounts, 1-Motor Top Side, 1-Transmission Side Top, 1-Transmission Side Underneath Car, I Think They Use What Is Called A Dog Bone For The Other Motor One & It Can Be At The Top Or Bottom Of Motor, Usually Bolts To Top Of Motor & Right Above Radiator As You Look Down, Hood Open, Or Front Of Engine Bottom Side, When You Give It Gas Your Engine Rolls To The Back Or Towards Fire Wall, It May Tweak CV Shaft Just Enough To Get It To Vibrate. Hope This Helps!

×

Ad

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

05 Malibu 3.5 L automatic. Runs good from 0-54 miles/hour. Suddenly above 55 mph runs rough&shakes.


You make no mention that you have had a fault code scan run, do that first.

Mar 30, 2017 | 2005 Chevrolet Malibu

2 Answers

My 2004 Rendezvous starts shaking at 35 mph and stop at 50 mph. If I let off the gas the shaking stops. whats wrong


This may a serious problem that may cause you to have a bad accident. Please take into a service shop ASAP and have them check it out.

Dec 09, 2014 | Buick Rendezvous Cars & Trucks

1 Answer

When I get past 60 mph my gas pedal shakes really bad


It's probably more than just the gas pedal shaking. Have the wheels balanced and see if that helps.

Dec 12, 2010 | 1996 Oldsmobile Aurora

1 Answer

My 1990 Buick Lesabre shakes at 40 mph what do I do?


Check front engine mounts. Open hood, hold brake pedal down, put car in drive, press gas pedal down a little and see if engine jumps up due to a broken mount.

Jul 10, 2009 | 1990 Buick LeSabre

2 Answers

1994 pontiac transport se sluggish running


Ck your exhaust pipe at rear of car noting any obnoxious smell like rottrn eggs. Hold a piece of paper, I use a dollar bill ,in in front of the exhaust. If it blows the paper gently, you have a catalyctic converter going or is bad. Will need replace if so.

Jun 02, 2009 | 1994 Pontiac Trans Sport

1 Answer

Geo tracker won't stay onas RPM drops in idle. Only pressing the gas keeps it on.


did you replace the fuel pump? if so was it an OEM or aftermarket pump, This happened to me on my van when I thought I would save a few dollars by using an aftermarket pump. I am not sure if your plenum has a test shrater valve. The plenum is what the injectors connect to that feed fuel to them. on this it normally has a valve like a bicycle valve this is where you connect a tester to check the fuel pressure. this is normally 6-8 psi on my car. yours maybe different. If the car is on this pressure should not drop.

May 25, 2009 | 1998 Chevrolet Tracker

1 Answer

92 Dodge Grand Caravan - shakes!!!!!!


It sounds like you need a tune change at least the wires and plugs it also could be a worn or broke motor or tranny mount.

Apr 07, 2009 | 2004 Pontiac Montana

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

745 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

yadayada
yadayada

Level 3 Expert

76132 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8273 Answers

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

Answer questions

Manuals & User Guides

Loading...