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Pontiac Grand Prix - 2005 and earlier

4431 messages,  Last post on Nov 30, 2009 at 7:07 AM

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What is this discussion about? Pontiac Grand Prix, Sedan

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#4399 of 4431 Re: Dual zone climate control problem [omegax] by druvie Jul 19, 2008 (7:14 pm)
Replying to: omegax (Jul 13, 2007 2:30 pm) I discovered today thatI have the same problen in my 2002 GTP. Do you have a fix?
#4400 of 4431 24 hrs of Lemons Race by mick7227 Jul 23, 2008 (5:45 pm)
I am entering a 91 GrandPrix in an endurance race called 24 hours of Lemons. Car had to be purchased for under $500 and then you add safety equipment. Anyway, looking for some advice: - Is there a rear sway bar upgrade or other suspension tricks for this year car - Any tuning tweaks? It has the 3.1 engine and it runs pretty good now.   Any advice on keeping this beast alive for 24hrs? Will be racing at Toledo Spwy in Sep.
#4401 of 4431 Re: 1990 Pontiac Grand Prix Rough idle [headach] by mick7227 Jul 24, 2008 (2:03 am)
Replying to: headach (Jun 25, 2008 5:05 pm) If you havent had it fixed yet, i would recommend checking the idle control valve. We have a 91 Grand Prix and a 90 Grand AM and experienced similar problem. We didnt even have to replace the part - just remove it and clean it good with carb cleaner. That did the trick
#4402 of 4431 Tranny Problems??? by schneider34 Jul 25, 2008 (4:55 am)
'97 Grand Prix-120K Miles Car will jerk and Tachometer quits working until car is turned off and turned back on. Usually happens when A/C or Heat have been on. Also, now this is strange, when you turn the wheel the radio volume goes down by itself...you can turn it right back up but obviously there is something wrong(and no I am not accidentally turning it down with the wheel volume controls). Just started doing this in the last 1000 miles. Electical issue??? Alternator??? Something more??? Anyone have and issues like this and maybe have what the solutions were??? If its gonna cost me a lot I am selling the thing, already put $3000 into it this past year.
#4403 of 4431 Exterior Temp/AC problem by monkey05 Jul 31, 2008 (6:53 am)
Kind of a unique problem I am having that hopefully someone can help me with   I have a 99 GTP and the exterior temp gadge is always off on the low side. In the summer I can watch it fall to 30 degrees and when it does the AC quits working. If I wait a while it may start climbing again and the AC will start working again but it's hit or miss, it only seems to do it on the really hot days. Any Ideas
#4404 of 4431 Re: SPARK PLUG REPLACEMENT [bgas] by jtg_2004 Aug 01, 2008 (2:40 pm)
Replying to: bgas (Jun 02, 2005 6:00 pm) this is relatively easy issue and i jsut did it so its fresh on the mind... on the front of the engine take out the bolts on the motormounts and leave the car in park... take a tow strap and hook it to the back on the engine(my car had the hook where you can lift the engine out) and the other end hook to somethign firm on the front of the car near the hood latch... tighten the strap down and the engine should easily tilt forward about 6 inches allowing you to get to th back 3 sparkplugs much much easier. when finished jsut undo the strap and put the motor mount bolts back in... good luck
#4405 of 4431 Re: 1990 Pontiac Grand Prix Rough idle [headach] by cafsaf Aug 01, 2008 (4:53 pm)
Replying to: headach (Jun 25, 2008 5:05 pm) Hi, I also have a 1990 pontiac grand prix. I think your problem is with the idle learn control. Any time the battery is disconnected for a period of time the computer(ecm) loses its idle learn memory and defaults to preset value. It will now have to be re programmed with the correct values. This can be done at your GM dealer for the cost of around $80.00 , depending where you are located. This is unique to 1998 through probably 1991 or 1992 pontiac models. After 92 GM fixed the problem and all you had to do was drive the car for about 10 miles at a proper speed above fifty mph. This would over write the limp back codes set in the ecm after losing the battery voltage for a period of time. I just replaced the radio in my pontiac and had the battery disconnected for two days, i now have to have the ecm re programmed with the correct values for the idle learn control. Symptoms are rough idle, stalling, engine surge and some times rough shifting when the torque convertor locks up putting the car in direct drive. Hope this was helpful Post if this fixes your problem cafsaf
#4406 of 4431 Replacing instrumentation bulbs by nkairns Aug 23, 2008 (2:25 am)
My 2004 Grand Prix GT has a few bulbs burrt out on the instrumentation panel. 4 on the radio buttons as well as the re-circulation button on the climate control.   Can these bulbs be replaced without changing the entire console? Replies to this message: jabond23 (Aug 28, 2008 4:26 am)
#4407 of 4431 Re: Welcome... [L8_Apex] by jabond23 Aug 26, 2008 (9:46 am)
Replying to: L8_Apex (May 06, 2000 3:05 pm) Wider is better!! more ground coverage makes it easier to corner. of course better tires and suspension will help too!
#4408 of 4431 Re: Welcome... [L8_Apex] by jabond23 Aug 26, 2008 (9:52 am)
Replying to: L8_Apex (May 06, 2000 3:05 pm) I have a very strange problem that has never happened to me before. everyone always gets a kick outta this.   I was driving to work one morning back in early july and went to turn on my a/c to keep me a little cool on the highway. As SOON as i turned it on the fan come on and stayed on. Even if i turned the knob for the speed control to off it would still stay on as well as when i turned the car off and took the key out it stayed on as well. Now i'm not a mechanic by any means, but i do understand the basics of how cars work. I'm pretty sure its an electrical problem but not sure where to look. Its not the switches (for the speed, temp, and vent selection) because once you disconnect them it still stays on. I've checked ALL the fuses and relays and they're all good still. The only way to get the fan to turn off is to disconnect it behind the dashboard where the climate control switch is also plugged in. But because of this i cannot use the a/c, heat, and rear defroster. Not having a/c is ok, but when it starts to get colder out, especially in jersey, its not going to be fun with no heat.   please let me know of any suggestions on the problem as i'm sure a mechanic would have field day with this! thank you!

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