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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#50 of 360 Re: 2004 Grand Prix starting and DIC problems. [bleukrayons]
Mar 24, 2008 (6:12 pm)
I just bought a 2004 Pontiac Grand Prix a week ago, and I am having the EXACT same problem...I have taken it to the dealership almost everyday since I got it to see what's wrong, and they can never figure it out. Everytime I take it it starts right up...and just like you said when it didn't start for me, I pumped the gas and it started right up. They said corrosion on the battery, then it was the terminals, now they don't know, so they have my car again. Did you ever figure our what was wrong? Thanks.
#51 of 360 maybe fixed?
Mar 28, 2008 (4:20 pm)
So they think they fixed my car. They said that it had a dirty throttle body and cleaned the fuel injectors, it has been working since tuesday without a bad start but it still sounds funny when it starts. I am being told by alot of people that it could be the fuel pump...I hope it's fixed...anyone know anything?
#52 of 360 you name it
Mar 30, 2008 (2:54 pm)
I have 02 grand prix that has a check engine light on and tells me to check the gas cap, in addition when the car is warmed up it stalls upon trying to start unless you rev the engine for a second then runs fine after that, I've replaced the gas cap and had a dealer reset the computer, engine light came back on just about right away, still doesn't start right either unless the car is cold. Any guesses?
#53 of 360 Stalling when warm
Mar 31, 2008 (4:09 pm)
This is a common issue with all 3.8L engines
Unless it is a series III it will be the Cranshaft position sensor Period.
It will not set a code.
The engine must be running for any code to set.
Since the engine is stalling no start Cranking over ect.
There is no referance for the engine to accept that it is in start run.
No signal is being sent there for the ecu ecm cpu what ever you want to call it
feels you are but sitting with key on not running.
Get an AC DELCO Only part. The off shelf parts at local parts store
Are pure junk. They will work But will!!! fail in less than 5k miles.
Why is the CPS failing? Heat soak getting hot and slowly deing. The AC DELCO will fail as well but it is of better quality. 20 to 30K easy.
#54 of 360 not starting and stalling
Apr 07, 2008 (9:02 am)
My 04 Grand Prix will not start sometimes in the morning. It cranks and you think it started, but it has not. Then it will stall backing out of the drive way. It also has the same starting problem after driving and the engine off for a short time. I noticed in the replies that the problem could be the CPS, but it was mentioned that if the engine is the Series III that it might not be. What else could be causing this problem?
#55 of 360 Re: 2004 Grand Prix starting and DIC problems. [danid]
Apr 08, 2008 (12:48 pm)
I have the same car and it would stall upon start up , i mean like an infinite # of times the only way i could get it to start was if i gave it a little bit of gas,finnaly we figured out the problem , it was the throttle body plates needed to cleaned . Maybe this could work for you.
#56 of 360 Re: 2004 Grand Prix starting and DIC problems. [jacques27]
Apr 08, 2008 (2:06 pm)
Thanks, this could be possible. Everytime I change my oil I add fuel injector cleaner. What did having the throttle body plates cleaned cost?
#57 of 360 limiter at 4200R's
Apr 15, 2008 (9:22 pm)
i have a friend that owns a 00 3.1 grand prix it bounces at 4200 rpm the only way i can decribe it is like a speed limiter (i know that's not what it is just using it to describe) it doesn't bounce as fast as any rev limiter i have seen, had a hard time starting and might be missing, i am not formiliar with these cars.... i have read this thread and i just want to make sure i did not miss read... it's the cps? and only get the ac delco? that sound about right?
#58 of 360 Re: 2004 Grand Prix starting and DIC problems. [danid]
Apr 16, 2008 (9:07 pm)
i have a 2005 grand prix with the same problem. but when i pump the gas and do to drive off the car shakes a little and doesnt have power until after 3000 rpm's. when i took it to the dealer they first said i was my aftermarket remote start. second was my autolite spark plus. third time was my transmission. fourth time i took it they said it was my thermostat. and my fifth time takin it the dealership said it needed the injectors cleaned. i cant even get the car to fall under the lemon law nor am i havin luck gettin rid off it. did anyone have any luck?
#59 of 360 Grand Prix 2000 GTP
Apr 19, 2008 (2:21 pm)
It will start with noproblem but stalls out in about 6sec. changed the fuil pump and its still the same.when you turn the key you can hear the pump but when you start it the pump stops running. when the car stalls the pump starts up again.(With a pressure gauge on when you turn the key its at 52 and once started it drops to 10 then stalls).Now i but aOBD on and it comes up with code P0452 . but once i cleared the code it will not come up again.
Totaly lost please help!!!