No Restart when Hot 3.8v6

hot(looking

Darby OGill wrote in alt.autos.gm

I am surprised that you couldn't find this. This is a fairly common problem. Heat related failures occur quite often, especially with newer cars with electronic components. Most likely components are the ignition coil pack, module or crank sensor. When electronic components start to go bad, they often fail under more extreme heat. And when you drive your car, then stop and shut it off, the heat no longer is being removed from the area around the engine. So it just builds up, and then slowly goes back down. Eventually it cools down far enough to allow the parts to start working again. And when the ambient temperature is lower, the lower the temp under the hood, and the faster the heat trapped will dissipatate.

Thanks David and Dick for your responses......David, that makes sense. I can check for spark. Can you advise me how to check for the rpm signal? I guess that this checks the crank sensor? Can I do this with a VOM? .......Dick, I could find others who had various heat related problems and possible sources ranging from ignition module to fuel pump. I didn't find any diagnostic suggetions for the driveway mucker.

hot(looking

afternoon-no

Electronics stores sell " circut cooler " a spray can of a refridgerant that rapidly cools parts like capacitors. Squirt suspect components that won't run hot.

The ground circut should be beefed up on older cars. This may / may not cure problem.

GM cars have thickly painted alternator brackets, the ground fastens with a sheet metal type screw. Unfasten ground, and move it to block itself, clean connection points. For the ultimate, use a stainless steel bolt. To be even safer, run an old battery cable from frame to block. This will probably brighten your taillights, which dim on older cars.