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02 Grand Prix/3.8 NA/starts and runs for 2 sec and kills?

J

jer7440

New member
My issues started almost 1 year ago. I was driving to work and the car just died. The lights and all the electrical still worked. I coasted to the side of the road and tried to restart. The motor would catch, rev to about 1500 rpm, and then die. I towed it to my work and the fun began! It was throwing a MAF code, so I replaced the MAF. No fix. I also tried swapping the MAP sensor, with a known good one. No fix. After several days of head scratching, one of the guys at work tells me his buddy says to try a different ignition key. I think this sounds ridiculous, but what the heck. I try my other key and the car starts and runs.

Fast forward almost a year. The car has been running fine, but I need to replace the intake manifold gaskets. I do the job, no problems. The car runs fine for 3 or 4 days, but on my way to work the car kills again and leaves me on the side of the road. I manage to start it this time and get it home. I go through and check all the sensor plugs to make sure they are seated properly, blah, blah, blah. The car starts and runs for a couple more days, and then it kills and leaves me on the side of the road again. I tow the car home and it won't start and stay running for several days. I figure its the PassKey system screwing me again, so I order a New Rockies bypass module. This thing is supposed to bypass the passkey system altogether. The day the NR module arrives, I try starting the car, before I install the module, and the dumb thing starts. I go ahead and wire in the module, anyway. I drive the car for several more days and I think my problem is solved. NOPE! It dies on me half way to work, again. I tow it again and now it has been sitting for over a week and it won't stay running. It will start, rev to 1500 rpm and then it stalls. I know the fuel pump is working. I know I have spark. I've read about lots of people having similar problems, but I don't ever see a solution.

Any suggestions would be appreciated!
 


ever notice if the tack drops to zero before it stalls out? or after it stalls and your cranking it does the tach lay at zero?

if so sounds like a crank sensor went bad.
 
Tach drops to zero at the same time as it stalls out. The engine will run for less that 3 seconds. I barely have to crank it, it catches, revs to 1500 and stalls.
 
Can you test fuel pressure? Almost sounds like it doesn't have any. If it has pressure..then it's likely security related.
 


Try watching voltage at the pump, see if when the car dies the voltage drops to 0. If so, you know something is killing power to your pump to shut the car down. If the voltage is going to 0, you could try putting a 12v source directly to the pump, start it up and see if it stays running. Then its just a matter of looking at the schematic and figuring out wtf is killing the power.
 
I know fuel comes out of the test valve, below the FPR. I haven't put a gauge on it, yet.

I have bypassed the security system with this: http://newrockies.com/passlock-bypass/ I don't get a flashing security light on the dash. I actually never did.

I did pull the fuel pump relay and jumpered between the two contacts to make the fuel pump run on high speed. I could hear the pump running, before starting and after, but this made no difference.

Thanks again for all the help!
 
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