3rd Mar 2010, 21:08

1998 GP/GT, turn the key and everything lights up, but the engine won't crank over. It was intermittent, but finally would not crank over at all.

Solution (open drivers window), insert ignition key, attempt to crank, leave the key on the ON position for 10 minutes, after the 10 minutes turn key from ON to OFF 4 or 5 times (this resets something), leave the key in the OFF position and leave the key in the ignition for 10 minutes. Then start the car and turn it off then start it again.

Fixed my 1998 GT, this is a pass key reset process.

If yours isn't fixed, the starter may be bad, or neutral interlock, or steering column wiring harness, or heater resistor, or fuse, or relay, or ignition key tumbler, or a worn out ignition key, or other things.

27th Mar 2010, 23:25

I am the original owner of a 1998 Pontiac GTP Daytona 500. I love it. We take good care of it. It gets whatever it needs.

I would like to find a new drivers seat. The leather is getting worn out along the left hand edge.

The clock doesn't light up any more. I don't like that, but there's nothing I can do about that, I guess.

7th May 2010, 10:21

Hi. I have a 1998 Grand Prix GTP. I just bought about 3 weeks ago. The check engine light just came on, so I took it in and had it put on the computer. Two different codes came up; p0440 and P1646. I have no idea how to fix these or where to start. Has anyone else had these problems? What was the fix? Any suggestions would be greatly appreciated. Thank you so much for your time.

12th May 2010, 22:46

Above poster.

Run a search on clubgp.com. Very informative forum, and odds are good that someone else has pulled up the same code as you on there.

Good luck!

5th Jun 2010, 19:17

I have a 1998 Grand Prix GTP. I replaced the trans, and when I start up the car, it just dies on me. I have to put it to the floor and keep pushing the gas up and down. Then it will stay running for about a minute and then it dies again. My vac lines keep blowing off and it is blowing air and not sucking. Can anyone help me? If you can, email me at grodek647@yahoo.com. I really need help, I would be very thankful.

13th Jul 2010, 12:17

I own a 2000 GTP that I purchased new in 2000. Never had any serious problems until last week. We were traveling, loaded, and it simply died on the interstate. No warnings, no lights. It cranks, but will not start. Small poofs of black smoke come out of the exhaust as we attempt to fire it, but nothing major. Any clues? It's obviously fuel related, but I'm told a pump replacement can be pricey.

19th Sep 2010, 03:52

Bought my used 97 GTP three weeks ago after a lengthy tour in Iraq, thinking it would be reliable (as opposed to a Mustang or Camaro). Week two, needed the supercharger coupling after the car sounded like a pile at stop lights. Week 3? Rod knock... wonderful.

Can't complain. I should not have purchased a car with 150k on it I guess.

18th Oct 2010, 07:58

I have a 97' Pontiac GTP that I've just gotten back up running again. I don't know a whole lot about cars and I'm having this problem with my front right tire. I've noticed that when I get up to 47 MPH or so my tire will wiggle a good bit. I've noticed my rotor wiggles some, could that be the problem? I really haven't a clue.

22nd Jan 2011, 22:58

I have a 99 Grand Prix GTP, and the car will start and you can drive it until it gets warm. Then it's like it goes into neutral. Then you can put the car in park, turn it off, restart it, drive it 30 more feet, then you have to do it all over again. Can someone help me? They said it might be the speed sensor or something to do with shift box. If anyone knows, please let me know. I love my car, and would not take nothing for it.

28th Mar 2011, 20:10

Check your spark plug wires.

10th Apr 2011, 22:16

I would definitely do the struts... I have a 98 GTP with 220k. It still runs strong. My driver's side rear spring broke and killed my tire. I replaced both rear struts and it rides good.

16th May 2011, 12:47

I agree!

I have a 1998 Pontiac Grand Prix GTP! Have never raced it or misused it! I have had the transmission rebuilt, a new supercharger installed, new radiator, new fuel tank twice and I'm still having problems with it! It is one of those official pace cars that was used in the Feb. 15th 98 Daytona 500 race.

I hate to get rid of it but it's really getting on my nerves!

17th May 2011, 13:55

Check your supercharger coupler... It's inside your supercharger nose.. easy fix, save yourself a bundle.

27th Sep 2011, 15:18

I have a 1998 Grand Prix, and it blowing fuses like crazy. Would anyone know why it would be blowing so many fuses?

29th Sep 2011, 01:50

Sounds to me like your fuel pump.

6th Nov 2011, 18:26

The intake gaskets, especially on a 3.8 VIN one are very simple to do. Don't let anyone scare you. These motors are very strong and dependable. If the price is fair, then jump all over it; it's worth it.

19th Nov 2011, 17:37

The rumbling sound or knock that some of these cars have is due to the coupler in the supercharger.

19th Dec 2011, 11:47

It is your supercharger coupler. I just pulled mine into my garage and replaced it. When you accelerate heavily, it causes your pulley to move back and forth, and put unnecessary wear on it. If you don't know how they work or how they come apart, take it to a shop, it will save you money and time.

20th Dec 2011, 11:14

No, just replace the sending unit; they are very faulty. I did on my car, and it happens to be the same model as yours. I over fill my tank all the time; it does not hurt it.

27th Feb 2012, 00:32

I had this happen in a Concorde, when I first bought it. It's your ABS module... or a tie rod. Check that you don't have a leak in your brake lines, and make sure you ABS module is looked at.

17th Jul 2014, 07:30

I have a 97 GTP, and I've had a new battery put on, checked plugs, fuses, and replaced the starter myself. When I try turning it over, I get nothing and I smell a melting wire smell. I don't know much about cars; any advice would help.

18th Jul 2014, 17:27

The person who replaced the starter probably didn't do such a good job with the wiring. It's not really that big of a deal though. One of those scented trees that can be attached to the rear view mirror will cancel out the other smells.

30th Aug 2014, 22:05

If it only happens when the engine gets warm, it is possible that the fuel pressure regulator is failing. The regulator is usually located on the top of the engine close to the fuel rail, and is not really expensive, and fairly simple to change. I know this is a shot in the dark without having a proper diagnosis, and throwing parts at an engine could be a waste of money, but it is inexpensive and simple. Good luck.

30th Aug 2015, 20:22

Does anyone know if this really works?