1998 Pontiac Grand Prix GTP Supercharge from North America - Comments

Comments: 1-15, 16-30, 31-45, 46-60, 61-75, 76-90, 91-103

25th Mar 2008, 18:21

What causes the fuelpump fuse to keep blowing every 2 weeks.

john

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29th Mar 2008, 18:19

I'm about to hopefully purchase a 2001 Grand Prix GTP, which has 132K on it, and I wish to use for highway driving only as I do an average commute of about 180 km a day. What problems will I encounter and what should I expect?

I have reviewed the car from top to bottom, and I love it. I test drove one and I swear it had a natural feel and felt safe. My only question is what can I expect in fuel costs, and what is the actual mpg or l/km I can expect? Everyone says for hwy driving it averages between 26 to 31 for long distance. My only question is with buying premium fuel, and besides driving with cruise control, how can I make it more fuel efficient?

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30th Mar 2008, 15:06

Just bought the same car roughly 6 months ago. I drive it fairly soft and average 20mpg average for city and highway driving. As far as premium fuel, I stopped stressing that because it only costs you an extra $5 for a full tank. As for saving fuel, make sure performance shift is off at all times, unless you are in a racing mood... when it's on your car will rev higher before going to the next gear, thus wasting gas. As tempting as it can be to squeal from stop signs, apply the gas lightly because the extra boost from the supercharger kicks in and really burns the fuel. Other than that, like you said, cruise control helps too. Amazing vehicle, lots of fun, reliable, and not that bad on gas considering the performance value. Hope this helps!

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1st Apr 2008, 16:35

I have a 1997 gtp & I love the car. the only major problem I have had with the car is the tranny; it cost me 2500 to rebuild it. Some say these cars are not too bad on gas but mine is only getting 17 mpg. Does anyone know why? I am also looking for a ram air style hood; can anybody help me with these problems?

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3rd Apr 2008, 09:37

I have a 98 grand prix gtp. And well when I'm on the high way and going about 75 or 80 mph and press the pedal all the way to the floor to pass, the light from the low track comes on and car hasitates. Can anyone help on this. JZ.

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5th Apr 2008, 17:22

I LOVE MY 97 GTP. I was driving it down the road today and smacked the gas at 45mph, and it chirped the wheels. What a fun and fast car to drive; fuel mileage sucks, but so what hey.

My car has 177,773 miles on it and still runs to the top. Very dependable car; love it.

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5th May 2008, 10:53

1998 Grand prix GTP Recall - March 2008.

If you own this car, please take it to the dealer for repair. The front Valve cover gasket is in recall, which can leak oil on hard braking and spill onto your manifold possibly causing a fire. blah blah blah.

I'm just letting you know since I just did it... and since it's a recall, its free. the recall is officially out too. As far as I know.. its the only one.

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19th Jun 2008, 10:23

This car is great don't get me wrong, but it definitely has its share of problems. If you buy a cheap set of breaks (under$40) then they will eventually start to squeal. Also my window regulator has just recently died and my supercharger is clunking. I am very slowly losing coolant and oil which could mean my head gasket is going. My origonal rear view mirror fogged over and was ruined. There is an odd squeak in the rear of the car that after putting the car on a lift numerous times I still can't figure it out. The felt on the ceiling in the rear of the car is slowly peeling off. The lumbar knob is broken, and my engine clunks sometimes when accelerating or breaking which most likely means I also have a broken mount. Other than the bads, I replaced the stock intake and coolant bottle with a motor sport intake and I chopped off the giant resonator and changed over to a 190 degree thermostat, the car definitely is quick.

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26th Jun 2008, 01:38

I own a '98 GT. =) It's fun. This is my first car and I haven't had any major problems. It's an amazing car and it's got 120,000 miles. Runs like a CHAMP! Besides brakes, struts, tires etc. etc. Everything is peachy king with it.

Does anyone know where to find a good headlight lens besides going through the dealer? I was told you have to replace the entire headlight/turning signal/parking lamp assembly... Is this true?

I just need a new head light lens because it's loose and I don't want it to fall off... Help? =)

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21st Jul 2008, 15:18

I have had a 4 door 98 GTP for 3 years now. If it wasn't such a piece of crap, it would be an excellent performance sedan.

Purchased with 142,000 km, it now has 240,000km. In this time, It's hard to imagine what it would cost a person of little mechanical know-how to keep this car running. It was built like a happy meal... no love.

- Rebuilt SC @ 180 KM, $1200

- All cheap plastic pulleys needed replaced, found out the hard way. $450 after tow, self installed.

- Car would shut down while driving, "crank shaft sensor". $240 @ shop

- Original ball-joints need to be drilled out. $250

- Outer tie ends. $90

- Inner tie end recall.

- Lower intake manifold leak, replace and engine back flushed. $1100 @ dealer

- Front gasket leak recall.

- Piece of fascia on passenger side came loose, rubbed against drive belt until it broke. $70 + $50 tow + loss of sanity.

- Passenger door light fell out, crushed when shut. FREE @ scrap yard.

- Passenger mirror fell off, super-glued back on.

- Blower motor. $220 @ dealer.

- Driver side wiper arm striped, put hole in upper hood fascia trying to fix it. $10 for arm, $20 for fascia @ scrap yard.

- Replaced foggy front turning lights. $50 ebay

- Need rear tail lights due to moisture, like every other Grand Prix. Ebay... is SOLD OUT! I looked today.

- HUD fades in and out.

- Seat belt light won't shut off.

- Glove box light wouldn't shut off. Rigged it to work.

- Every nut and bolt needed tightening in the dash. Put in felt pads to stop rubbing & rattling.

- Air bag light comes on and off in winter.

Replaced struts with Monroe quick struts for $980. Dealer would have cost about $2700 for complete assembly!

2 new wheel bearings off e bay for $220 instead of $300 each!

Now all it needs is intake manifolds, CC & mufflers, fuel injectors, fuel pump, alternator, spark plugs & lines, rubber bushings, AC recharge and a paint job.

I'll have a new 1998 Pontiac Grand Prix with 240,000 KM on it.

With gas @ $1.44L and rising for 91 octane, I'll never sell this car... ever.

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13th Sep 2008, 11:34

I have a 97 Grand Prix Supercharged, I love this car.

When the car is warm and I try to start it, it starts and runs, but seems as if it is starving for gas and eventually stalls. If I left and came back it started. Yesterday the fuel filter and pump were replaced. Ran fine, filled it up at the pumps, went to start it. Same thing, got it parked on the street left it for a few hours, now it is doing it on a cold start. Anyone have any ideas?

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13th Sep 2008, 11:51

It is very obvious to me that some of the complaints about the grand prix have a lot more to do with the lack of maintainance, rather than the car falling apart, I have a 98 gtp with 400.000 kms on it and really can't complain about it.

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2nd Nov 2008, 23:48

I have a modified 2001 GTP, and upgraded the struts to KYB GR2 and GMPP performance springs two years after I had bought it in 2002 with 19k miles on it.

I have had my share of hesitation and "check engine light" problems in the beginning that dealers could not fix, which turned out to be related to the aftermarket remote starter that it came with before I took ownership of it. I just repaired the ignition connection to where the remote starter tapped into, and it has been good ever since.

Recently, I have had to dump money in to it starting from LIM gaskets, rack & pinion, power steering pump, battery, tie-rods (2nd set), and all six injectors.

I now have 75k on it, and the supercharger is still strong and makes enough boost with the 3.5" pulley with 0* of knock retard.

This vehicle has all supporting mods including larger exhaust, Intense 1.8 rocker arms, DHP 1.0 Pcm, UnderDrive WP Pulley, Alternator Rewire, Front&Rear GMPP Sway Bars, Anti-Pogo Washers, Front&Rear Strut-Tower Brace, MSD Coils, PRJ Wires, NGK TR6 spark plugs,12" Front Brake Upgrade, K&N Air Filter, and Mobil One oil/filter every 5000 miles.

Obviously you can see cars wear down with age, and maintenance is the key, especially if you plan to modify it and do it right with supporting mods as above.

Grand Prixs are nice cars to have, but you have to take care of them as they age overall with time; nothing but patience and TLC every so often, and you'll have a good running long lasting car in the end.

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5th Nov 2008, 14:11

I have the 97 GTP, and it's an all around amazing car.

I found that driving without the performance shift saves some gas, along with not flooring, which can be tempting. But on average I'm around 22mpg, which is pretty good for the engine.

Like I said, awesome car, a lot of fun to drive.

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1st Dec 2008, 17:05

The key to keeping the GTP alive is taking care of it.

I have a 98 grand prix gtp with 180k on it and it runs just like the day I got it 5 years ago. The only problem I have had with it and the one before it is the trans, going out around 100k, everything else is just wear and tear with age.

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