Question about 1998 Pontiac Grand Prix

2 Answers

Car acts like its sliping or miss fireing when driving

Changed coil packs . map air sens . and tpi sens and still dong it

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 957 Answers

Is the eng, light on, if so use the found codes as a basis. check the fuel system for low fuel pump pressure, clogged fuel filter. If its fine check the exhaust back pressure. Before the cat. pull the O2 sensor
out and install a low pressure gauge to see there is excessive back pressure. more then 5 to 10 PSI would indicate an issue with the CAT.

Posted on Apr 24, 2009

  • Level 1:

    An expert who has achieved level 1.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 1 Answer

Mine did the same thing too. Engine light came on, spuddered and did not accelerate. I brought into my local shop, (i was in a bind and had no other options, late 4 work, and they had a shuttle service). they scannd it and said it was one of the coil packs. So i replaced it with one from a slavage yard. Still threw the same code. I overlooked the obvious, the plugs were completely shot. I changed plugs/wires, ran great, better than ever. Brought the old plugs down to shop and they said they checked them and they were fine. They didn't of course. They're a bunch of morons.Have you Checked plugs and wires??

Posted on Jun 07, 2009

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


1998 Pontiac Grand Prix Logo

141 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts


Level 3 Expert

75197 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7782 Answers

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

Answer questions

Manuals & User Guides