Last post on May 15, 2013 at 6:16 PM
You are in the Pontiac Grand Prix
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Pontiac Grand Prix, Engine, Sedan
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#16 of 360 Re: 2004 Grand Prix starting and DIC problems. [medic2891]
Nov 02, 2007 (6:43 am)
I purchased an 04 Grand Prix in January 2007 and have had problems with hard starts intermittently since I've had it.
The GM Repair shop can never duplicate it.
Recently an 02 sensor in the manifold make the engine light come on. When the 02 sensor was changed the new one was defective and shut down nearly all the gas right after I left the shop, I made it back to the shop on very little power.
I'm still not sure if there are more problems with the engine or not.
I have always liked Pontiac until this one.
#17 of 360 Still stalling
Nov 04, 2007 (5:42 am)
OK the price of parts have escalated out of control the module is $485 from dealer and $278 from parts store, The CSP is still $35 coils $120 ect
I do have a new question and it pulls up every time I look for parts. Camshaft Position sensor. I can find one on the car and the part locator can not tell me where it is.
Does the 3.8 S II have one?? Oh on another note I will be paying the Hoe off soon and parting her out.
#18 of 360 Starting problems FIX
Nov 11, 2007 (5:44 pm)
Check your BATTERY, If It's old change it!!! I've been having starting and shutting off problems on my 98 GTP off and on for almost 2 years. Every time I worked on my car it would be OK for a little while. It would come and go but always come back. Then I read something on wikipedia about ECU's. Pontiac's are called PCU's. It reads "With advanced age, a failing ECU can cause seemingly random starting and driveability faults. For example, a vehicle may refuse to start when cranked with the starter motor, but may respond easily to a push start. Failing electrolytic capacitors in the ECU no longer smooth the power supply to the microprocessor, and the varying load on the starter motor causes sufficient line voltage fluctuation that the computer reboots repeatedly while attempting to start the engine" This started to make sense. Every time I would work on my car I would charge my battery, and It would run fine for a while. So I charged up my battery again and hooked up a volt meter to my cigarette lighter port to monitor my system voltage. It ran fine. As I would drive my car my voltage would slowly creep down. While trying to start my car the voltage would really drop. after a couple of days It wouldn't start again. the voltage was dropping below 9.5 volts while the starter was running. It was turning over fine but the computer will reboot if the voltage drops under 10 volts. The Ignition will not fire while the computer reboots. So I went and replaced my Battery. It's been 3 weeks and not single problem starting or shutting off while driving. The voltage is holding fine at over 12.5 volts and stays over 12 volts while starting. If this doesn't fix the problem you may have to change out the PCU (about $300). But try the Battery first. It is a cheep fix compared to all of the other things that most of us have tried. Hope It works for you. It has made my wife very, very happy.
#19 of 360 Re: Starting problems FIX [kish81]
Nov 28, 2007 (10:58 pm)
I had that problem on my '02 gt. It got progressively worse til the car would barely get out of its own way. turned out it was the catalytic converter. replaced it and no probs since.
#20 of 360 Re: GRAND PRIX STALLING AT IDLE [alburgian]
Nov 30, 2007 (10:03 am)
I was wondering if you had discovered what the problem is with your grand prix.I have a 97, grand prix and mine is doing the same thing.I noticed if I drive in 3rd it does not stall while I am driving anymore.. Also, when I was driving it had like jerkyness to it and the mph meter jumps all over the place...Mostly in Drive!
#21 of 360 1994 Pontiac Grand Prix
Dec 07, 2007 (11:38 am)
i have a 1994 pontiac grand prix that has had problem after problem cinsce i bought it in 2003. it had like 67.000 miles and within a week i had to take it to the dealer to install a 400.00 EGR valve. now with 114,000 miles the problem are still coming. during last year i noticed a strong odor of gas then to realizes that gas was puring out the filler neck when i pumped it in. i ignored it because it was a small leak. i had to take it in for inspection to find that from the gas tank back was rotted out. a little thing the dealer neglected to tell me. never the less i pulled some strings to get it to pass. i knew the guy and i plan on trying to fix it. but with more problems it decided to not start. i turn the key, light stay strong and nothing. no click roar or anything. this car has that chip on the key could that be it. please can anyone help.
#22 of 360 It starts, just by itself.
Dec 15, 2007 (9:59 pm)
My Grand Prix gave me a shock the other day. I came outside and it started turning itself on and off, and it would stay on for at most 5 seconds. Of course no one was in the car and there was no key in the igniton and it doesnt have a remote start. But it was starting itself. Now have I either bought myself a Transformer or is there some major electrical problems going on somewhere that i dont know how to find. Any suggestionsfor where the problem is occurign from?
#23 of 360 Pontiac Grand Prix (1998 3.8L) Stalling After Ingnition
Dec 19, 2007 (2:23 pm)
#24 of 360 Pontiac Grand Prix (1998 3.8L) Stalling After Ingnition
Dec 19, 2007 (2:23 pm)
Hi I wonder if anyone can help?
I imported a 1998 Pontiac Grand Prix to the UK as the begining of the year, had no problems until recently.
The car starts, however as soon as it is running it starts too stall and sucks in load of air, blows back through the exhaust and dies, very odd, fuel is fine!!
Anyone have any ideas?
Jan 02, 2008 (10:51 pm)
I have a 2001 Pontiac Grand Prix and it has insane problems. The Service Engine Soon light came on a few days ago and has yet to turn off. Also I get the Tac dropping to 0 and then about 5-10 seconds later the Traction Control turns off. Also when the car is cold it seems and if I am going around corners or up a hill the car will stall and sometimes it will start right away and other times it takes 5-10 minutes for the car to start. Any ideas? The car has regular oil changes and when I bought the car (summer 2004) I had the thermostat fixed and later on (mid 2005) the servies engine soon light was on forever and it turned out I needed a new Catalytic Converter and a tune up.