99 grand prix gtp 3.8 wont stay running HELP

Possibly a clogged or constricted fuel line between the tank and the pump or the pickup in the tank. Somewhere downstream of your pressure gauge. While the car is sitting, the pump is able to build up adequate pressure, but, once the engine is started, it can't push/pull fuel through the system fast enough to keep up the pressure.

Tom S.

Assuming both filters are new, I'd ohm out the pump ground wire.

sounds more like the theftlock

I have a problem very much like this. It is with a 96 grand am 2.4 twin cam. will crank and run for about 2to3 seconds then dies if you turn the key ll the way off and recrank it does the ame thing. How do you reset the theftlock system.

While it doesn't happen very often be sure to checked for a blocked exhaust. Just have someone at the exhaust when the car starts and make sure something is coming out. Had a much older Ford with similar symptoms with a totally blocked catalytic converter.

I'm having the same problem!In testing if on the fuse relay panel you jumper the f/pmp spd cont relay between pin 30 and 87a it should start and stay running. still testing to find out why i need to do this. but this counts out cat. conveter and fuel pump, as this is the fuel pump speed controll relay (car speed ie. if in park or neut. can't over rev eng.)will post findings any help out there?

From looking at the diagram my guess is that your fuel pump resistor is open circuited.

According to the service manual here is where it's located: Mounted to the outside of the right front frame rail forward of the front wheel

most gm's its turn the key to the on position (not start) for 600 seconds (10 mins)

I searched the archives and found a listing on 2005-july-05 under 2000 GTP runs 5 seconds then die tells you where the resistor is and how to fix. pulled mine off it was bad did ohms test on it and keep getting random values so siver surfer is right. Thanks everyone I will pick one up tommorrow

BINGO!! Right on MC. your solution was the fix I needed. Thank you Thank you. turned the key to on and waited 10 min then tried cranking it and it started right up and kept running. thanks a million!!

n/p

HAD THE SAME PROBLEM SILVER SUFER WAS RIGHT REPLACED RESISTOR AND CAR STARTED RIGHT UP THANKS

"onkatt" wrote

Yet more BS from a talkaboutautos.com drama queen.

i have a 97 buick that wont crank.I change starter and nuetral safety swicth.I tested the security system and think its the problem.How can i reset help!!!!!!

Hi. I have the same EXACT problem happening right now. You try once and the car is dead - nothing. Try a couple minutes later and gauges go crazy - still no start. MUST be the security system. Was wondering how you made out. Might really help. Thanks! corey snipped-for-privacy@hotmail.com

Does the "Security" light on the dash flash or come on when you try to start it? Have you tried a spare key? If your Lesabre is like my Bonneville, it has one of those dumb keys with the chip in it. If the ignition doesn't detect the proper value from that chip in your key, the car won't start. As far as I know, there is no way to 'reset' the security system other then disabling it by unlocking the doors, however, I believe if your car thought you were stealing it, the horn would be honking it's head off. If you think its the security system, then it's likely your key. Try a spare if you have one. By the way, how did you 'test' the security system? What did you do?