GP just shuts off

Got a 2000 GT with 83000, I got it out of storage this winter and when I start it, it dies with in a second or two. However, sometimes it just won't turn over for a while, but that hasn't happend in a couple weeks. Now it just won't stay running, NO MATTER what the RPM is at. I have had it at full REV still just shuts off. I tried changing the IAC but it still did it this morning. No codes or anything. I found that if I turn the key back to OFF and then try again it starts right up. Other than this, it runs like a champ. ANY IDEAS????:banghead:

Have you changed the fuel filter? Sounds like a fuel supply issue. Check the fuel pressure at the front fuel injector rail. There is a Schrader valve at the fuel pressure regulator where you can connect a fuel pressure gauge. Should be 48-55 psi. Check at fuel pump prime since you are having difficulty keeping it running. Ignition to on not start. Also, you should hear the fuel pump prime for a couple of seconds.

The other possibility is the MAF sensor so disconnect it to rule it out.

I just changed the fuel filter last year before I put it away. It has to be something that gets reset when the car is turned off and the key is turned back. So its got to be a sensor. That MAF maybe it. Seriously, after it starts runs fine never know anything was wrong, good response and power. It doesn't do it everytime, probably 1 out of 10 starts if that. Its not really a problem, just a hassle and I don't want it to get worse. Anyother ideas let me know.

When the car dies, does any of your console warning indicators show?

When I start it, it will run normal for a second or two. Then it literally is like u just turned the car off, no matter what the RPM is at. U can here the air suck in the K&N filter and everything. It is either electrical, or electric fuel wise, like a tricky fuel pump. Cause it will just reset itself after being shut off for a while. But it isn't coding for anything. To answer ur question the dash lights come on just as if you turn the key to the ON position. Now that I think about it the SECURITY light will stay on sometimes after starting it, but it doesn't really correlate with the trouble of starting. Its just something that it started doing after I had the starting problem.:banghead:

keep your eye one the DIC when it shuts off. Does the "Trac Off" light come on when it stalls? If so, replace the Crank Position Sensor.

Nope, I'm telling u guys, It is 100% identical to just shutting the car off, by turning the key back. U seriously couldn't tell the diffrence. Nothing unordinary happens except it just dying. No wierd lights, nothing. The only other thing that has came up, is the SECURITY light stays on sometimes, but it seems to have no relationship. Thanks for trying to help everyone, let me know if anything else comes to mind. The only status update is that it is getting harder to get to come out of its funk, but again once it is starts it runs fine and wont do it again for awhile.:banghead:

Man, it sounds so much like a failing Crank Position Sensor. I had mine fail at about that exact same amount of milage.

When it stalls, it will crank for some time befoer it restarts? Why not check for spark after it stalls out? Remove the plug wires from the coil packs and have an assistant crank it. Observe the coils and watch as the motor cranks. You should see and hear sparks dancing between each coil. If you dont, you know the problem is ignition related, and you can rule out the MAF.

No spark, then consider replacement of the CPS. Its only a 50 dollar AC Delco part and quite easy to replace on the 3800. There's a tech article in the Tips and Maintenance subforum. I did mine in about an hour and a half.

Wouldn't that give me problems also while I am driving? This is just at start up.

Nope, a CPS when fails will just cause the car to drive perfectly fine, then just stall out of no where. Sometimes restart right away, sometimes have to sit a few minutes before it restarts. When it starts it will run perfect again. Usually a bad one will not trip any DTC fault codes, so ususally it wont trip the ses light.

Nope, a CPS when fails will just cause the car to drive perfectly fine, then just stall out of no where. Sometimes restart right away, sometimes have to sit a few minutes before it restarts. When it starts it will run perfect again. Usually a bad one will not trip any DTC fault codes, so ususally it wont trip the ses light.
This is the exact same thing problem I was having with my car. Took it to the shop, they thought it was the Crank Position Sensor. That didn't fix the problem. I figured out if was the MAF sensor.

Just disconnect the MAF. When you start it up at first, it may run a little rough for a minute or two, but will run fine afterwards.

This is an easy, and free diagnoses. Since replacing the CPS is a pain.

This doesn't run rough before it dies, it just stops. Like turning the key off. I took it to my shop yesterday to get radiator flushed. I asked what he thought. He came up with Fuel Pressure Regulator. This Sucks:banghead:

I asked what he thought. He came up with Fuel Pressure Regulator. This Sucks:banghead:

All you have to do is run a fuel pressure check as suggested earlier which checks out the fuel pressure regulator operation. Expensive part to be replacing without proving it is bad.

keep your eye one the DIC when it shuts off. Does the "Trac Off" light come on when it stalls? If so, replace the Crank Position Sensor.

Along the same line of thinking doesn't a bad Camshaft Position Sensor have the same symptoms as the Crank Position Sensor? Only a bad Cam Pos Sensor will allow the engine to start where as a bad Crank will not?

Just a thought.

it will, good point, but doesnt a bad cam position sensor cause extended crank times as the PCM defaults to just the crank sensor signal? Also when it starts I think it will trip an ses light.

I still think 2nd post is correct fuel issue

it will, good point, but doesnt a bad cam position sensor cause extended crank times as the PCM defaults to just the crank sensor signal? Also when it starts I think it will trip an ses light.

You would hope.

Here's my theory. Bare in mind that I am by know means a technician.

The cam sensor may be sending signals to the PCM. The PCM does not have the ability to decide whether they are accurate or not. Only that input is present. The PCM assumes no fault since it is getting signals from the cam sensor, result....no SES since the PCM assumes the cam sensor knows what it's doing.

I know...sounds a bit far fetched but that's how I see it.

Besides...it saves you the time and money to change them both since they are in the same space.

I have no opinions as to the crank or cam positions sensors being the cause since I've already stated my opinion of the OP's issue. However:

To clear the air the PCM module does monitor the camshaft position signal (CMP). It is more complex and mathematical than described. It constantly monitors the number of pulses on the CMP signal circuit and compares the number of CMP pulses to the number of 24X/18X pulses and 3X pulses being received from the crank position sensor. So technically if the PCM receives an incorrect number of pulses on the CMP signal circuit then it should trigger a P0340 or P0341 DTC. That way the following can or should occur. If the camshaft position signal is lost while the engine is running, the fuel injection system will shift to a calculated fuel injection mode based on the last fuel injection pulse, and the engine will continue to run. The engine can be restarted and will run in the calculated mode as long as the fault is present.


:popcorn:

been reading your issue, i have a 2000 bucik regal GS supercharged. last sunday, when on the freeway the car died. symptoms are the same, engine starts but dies within two seconds. the car is at the shop they get no codes and the fuel pump was replaced. have mentioned all the posted items which they have already checked (okay). the MAF sensor requires them to special order the part, so at this time they are sourcing a loner.
if there are any other options or if you found a fix, let me know - i will inform the group of the GS outcome -regards

been reading your issue, i have a 2000 bucik regal GS supercharged. last sunday, when on the freeway the car died. symptoms are the same, engine starts but dies within two seconds. the car is at the shop they get no codes and the fuel pump was replaced. have mentioned all the posted items which they have already checked (okay). the MAF sensor requires them to special order the part, so at this time they are sourcing a loner.
if there are any other options or if you found a fix, let me know - i will inform the group of the GS outcome -regards

Welcome to AF.

What happens when the electrical connector to the MAF sensor is disconnected?

Unlike the normally aspirated SII 3800 you may still have a fuel related problem. Did you try bypassing the fuel pump resistor for the fuel pump speed control relay located in the engine compartment fuse box? The OP has a normally aspirated SII 3800 engine and the fuel pump circuits for '97-'00 GTP and Regal GS is different so the problem you are having may not really be the same, maybe at least the fix.

The fuel pump speed control relay for the '00 Regal GS is relay #18. See link below located at our Grand Prix Tips & Maintenance forum.

Click here (http://www.automotiveforums.com/vbulletin/showthread.php?t=658282)

Its getting worse. It just did it 3 times in a row.:banghead:

Does it restart immediatly? If not, find out why. We could speculate all day long

Have you checked fuel pressure at idle like Bob said yet? Might even try taping the fuel pressure guage and drive around untill it dies while you keep your eye on it.

Still sort of sounds like an ignition issue to me. Either CPS or Ignition Module. Could remove the ignition module and have a place like autozone test it for you. Once they have, and if they say it good, have them check it over and over again just to get it good and hot.

Hopefully, sometime this weekend I can get the ignition module checked to rule it out. I don't know if I should go ahead and spend the $50 on the fuel pressure reg. or not. I don't have a fuel pressure gauge to check it. So thats out unless I find someone that has one. Still does the same thing. Dies a second after ignition. Seems to start easier than it did. But if I listen to make sure the fuel line primes all the way it increases my chances of it staying running by around 50%. I also need to replace the trasmission line that goes to the top of the radiator changed. Some dumba** cut it to change the tranny fluid, some while back. The shop I go to said that was goin to be like 200 because they have to drop the fans to route it the way it needs to go. SO if anyone has some cheaper ideas on that I would appreciate it.

You can rent fuel pressure guages from places like autozone or advance for free. Just have to pay the full amount up front, then they refund completly if its returned in a timly manner.

Sorry cant help you with the tranny cooler line issue. The doofus that cut it and rerouted it must be a mojor DINK. if its worth doing, its worth doing right! Especially on a GP.

had the same problem it took my mechanic 4 months to figure out that it was a crank sensor. No codes showed for this. I also recently had it die out and misfire bad. that problem was a maf air flow sensor. you could try both of these buy is sounds like a crank sensor. I have a 99 grand prix gt. Good luck!!

One thing I'd like to point out on a typical suspected bad crank position sensor is although no codes may be set or SES/CEL light another good indication is the tach acting up (dipping) or the TRAC OFF light comes on since the PCM module has gone into a failsafe mode.

Also, one member that posted did get resolution of his issue. :thumbsup: He informed me the fuel pump resistor was bad but he has a L67 Supercharged SII 3800 engine so that is not applicable to the SE/GT GP models.

been reading your issue, i have a 2000 bucik regal GS supercharged. last sunday, when on the freeway the car died. symptoms are the same, engine starts but dies within two seconds. the car is at the shop they get no codes and the fuel pump was replaced. have mentioned all the posted items which they have already checked (okay). the MAF sensor requires them to special order the part, so at this time they are sourcing a loner.
if there are any other options or if you found a fix, let me know - i will inform the group of the GS outcome -regards



Unlike the normally aspirated SII 3800 you may still have a fuel related problem. Did you try bypassing the fuel pump resistor for the fuel pump speed control relay located in the engine compartment fuse box? The OP has a normally aspirated SII 3800 engine and the fuel pump circuits for '97-'00 GTP and Regal GS is different so the problem you are having may not really be the same, maybe at least the fix.

The fuel pump speed control relay for the '00 Regal GS is relay #18. See link below located at our Grand Prix Tips & Maintenance forum.

Click here (http://www.automotiveforums.com/vbulletin/showthread.php?t=658282)