Last post on Dec 11, 2013 at 6:59 PM
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Pontiac Grand Prix, Engine, Sedan
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#11 of 374 GRAND PRIX STALLING AT IDLE
Aug 13, 2007 (3:18 pm)
I have a 1997 Pontiac Grand Prix GTP Supercharged with 88,000 miles. It just started stalling while driving along. The battery light comes on and it stalls. It will re-start after. This seems to happen at slow speeds (around 35 mph) and city driving. It has also happened just coasting down a hill. We have replaced the spark plugs and wires and the alternator. I am still having the problem. Has anybody had this happen and fixed the problem? I would really like to know how. Thanks
#12 of 374 Re: 2004 Grand Prix starting and DIC problems. [mtgp04]
Sep 12, 2007 (5:24 am)
I am having the exact same problem on my 2004 GT GP2. The only difference is I am not having the DIC issue. What was the solution to your starting problem. The dealer I have purchased the car from is not a Pontiac dealer, and all they have done is cleaned the injectors and reflashed the PCM a few times. I am still having this issue and am getting a little tired of it.
#13 of 374 Re: GRAND PRIX STALLING AT IDLE [alburgian]
Oct 05, 2007 (8:09 pm)
my 99 gt did the same thing. it turned out to be an old mass airflow sensor. $240 later it runs great. This happened because of my intake. There was also a problem with my body control modulater. But i got that fixed as well.
#14 of 374 Same crap help
Oct 14, 2007 (9:45 am)
1997 Pontiac Grand Prix L 3.8 SII POS.
Bought in 1999 for a grip of cash. 3 Weeks after I. Got it, it started to die for no reason at all. I would wait for a few min and it would start. Had someone with me when it did it, so popped hood checked for spark NOPE! Check for Fuel Yep! so the is an issue with ignition system. Then it would start wile I was searching for problem. Run for a week or so then start it stalling crap again. Off to dealer it went $$$$ later no problem found new dealer $$$$ later no problem. this took me to PEP Boys where they Changed CSP Crankshaft position sensor mega $$$ Week later it's towed back in to PEP Boys under warranty new CSP and Module $$$ 8 weeks later towed back to PEP Boys for CSP MOD and 3 new coils. 2 yes 2 FN hours it died back to PEP Boys "Why well under warranty and cheaper than dealer"
Was told when 1 part fails it takes down many OK Now new ECU CSP coils module plugs wires oil filters water temp oil sensor and a battery. Sh!t did I get a new Car. Warp to 2007 I have put 1200 miles on the car since then It sits till I get home Over the road truck driver
so it gets little use, But hey it runs with a battery minder on it, it has not let me down for 5 years. So I trade the hoe in on a new 2006 GP 3.8 SIII that has absolutely no guts at all.
Well, the 06 has to back for warranty work on brakes, Damn thing. They did a lot of recall work on it as well. Well, I am now an in town truck driver so need a car. What do I see? My old hoe right there, There going to scarp her out for parts. Why she looks brand new 67K on her and I loved her. What an ass I was to sell her. So I buy the hoe back and will park the 06 for you know good dates and what knots. Bad idea the hoe has started her crap again. Now I dive the 06 to work white out side white parchment inside am get her messed up so I have to fix the 97 soon 2 car payments and a truck payment too. Don't ask yes semi truck $567 a week ouch. Oh and I failed to tell you I'm an ASE certified master mechanic with 190K of tools and I hate to work on cars LOL.
#15 of 374 Re: Same crap help [bookster]
Oct 21, 2007 (5:04 pm)
Hope you can help. My 98 GTP witch is great car, has been shutting off and staling hear and there, for the last year. let it sit and it is fine. it has been getting worse. It has fuel but no spark. done all of the tune up stuff. It runs great when it is running.
#16 of 374 Re: 2004 Grand Prix starting and DIC problems. [medic2891]
Nov 02, 2007 (5:43 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 374 Still stalling
Nov 04, 2007 (4:42 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 374 Starting problems FIX
Nov 11, 2007 (4:44 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 374 Re: Starting problems FIX [kish81]
Nov 28, 2007 (9:58 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 374 Re: GRAND PRIX STALLING AT IDLE [alburgian]
Nov 30, 2007 (9:03 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!