Doc.... (off topic)

Yank the CTS harness from the sensor and prevent it from "warming up"; fool the computer into thinking the coolant is -40*. If it doesn't crap out and keeps running (don't panic, idle will be around 2k), you know you have a mixture problem and it's some EFI component on the fritz. If it STILL craps out, you know some part is heating up and dying, and good luck finding it!

In the meantime, check all battery cables, power cables, ground cables. Look especially for corroded/dirty connections. As temperature increases, so does resistance in the wiring, so if you have a "barely" flowing cable somewhere as soon as she heats up current flow will be cut off to the point she dies.

HTH,

Doc

sounds like IGN module is crapping when it warms up

hit 'send' too soon

just cause it's 'new' doesn't mean its good..........especially if you didn't clean the mounting area and use the white goo under it...........

Thanks Doc and TransSurgeon...

Actually I have had 2 ignition modules now and I used the heat sink compound. "Good luck finding this s*it" is right Doc... Never had these problems back in the 60's. Computers belong on a desk, not in cars. :)

This is annoying!!!!

Just yank the CTS harness and see where that gets you. Let us know.

Doc

OK Doc, Ill give it a shot tomorrow and let you know... it makes sense that something with temp is involved.

Ask him if he's getting a good 17+lbs.vacume at the pcv,[or iis that pvc?]

======================= Dont forget about the pick-up coil.....

Just to be safe I stopped by the local Chevy dealer and picked up a new one today. The last one I bought was not OEM and I've heard and read a lot of complaints about them.

As someone mentioned , check the pickup coil in the distributor. My 89 pickup w/305 was driving me crazy. It would act like your truck is. Sometimes it would start right back up & be fine for days. Other times it would quit and I would have to wait for between several minutes to around twenty minutes for it to start up and run again. The only common factor seemed to be that when I opened the hood up to let the engine cool down quicker it would start back up sooner. Prior to that I changed ignition module,coil, checked wiring, etc. Finally I changed the pickup coil in the distributor and it's been running fine ever since (about six months). Coincidentally, while it had the problem of cutting out, my speedometer would occasionally stop working once in a while for between a few minutes to maybe thirty minutes. But the speedometer quitting and the engine quitting never happened at the same times. But ever since changing the pickup coil, my speedometer has worked just fine. What the connection was I don't know. I hope you find the gremlin under your hood soon.