Pontiac Repair: 95 pontiac bonneville w/3.8 turns off unexspectedly when hot, crank shaft position sensor, pontiac bonneville


Question
95 Pontiac bonneville turns off unexpectedly while driving. If i let it sit for a few minutes i can turn it back on. i replaced the fuel pump 2 months ago and everything was fine. it cold starts fine...no trouble. any info would be helpfull. thank you in advance.

Answer
Hi Andrew:

This could be a couple of things a fuel pump is pretty common but you said you changed it already was it doing the same thing back then or was it just a no start? that car has an issue for the ground ckt to the pump when that goes bad the pump quits but also you loose a lot of other things like the power windows etc.. when it quits does it chuggle and spit before it quits or is it like someone turned off the key? if it chugges and sputters it's loosing fule pressure before it dies. The other way it's more than likely an ignition issue the most common thing is a crank shaft position sensor. it could also me an ignition control module or even a bad ground to the ignition module. These cars have quite a few stalling scenarios and each one is a bit different. My gut feeling is a crank sensor but with out seeing it do it it's hard to say. If it stalls all the time and after getting hot just let in ruin in the driveway until it quits and then check to see what's missing fuel pump pressure or your loosing spark. That's the best way to pin point it. I know it sucks being that it's intermittent and all. Good Luck :)