Has anyone ever heard of a fauly ECM and or PROM overadvancing the timing to the point it stalls? Around town, idle whatever the engine runs fine. Get on the freeway or higher RPMs sustained and the engine bogs down and stalls. If you try to restart it immediately it will hardly turn over like the timing is way to advanced. Turn off the ignition and wait a minute and it starts and runs just fine.

 

Just curious as to why you might think it is the timing. Is it knocking bad before it dies?

 

Its not knocking, at least not so I can hear it, but the way the engine slows more and more, and it takes more throttle to keep it running. You know how the starter can hardly turn the engine over if the timing is too advanced, well thats what it does immediately after it stalls, but if you wait aprox. 1 minute sometimes less it starts right up just fine. Battery is brand new and their are no charging problems. New coil, new pick-up coil, module checks out positive. The engine also starts heating up when this occurs. Not to the red but it does heat up rapidly when this occurs. New stat, new pump, new radiator, and the engine was boiled before i reassembled it.

 

I doubt you have an ECU problem. IMO you have 3 possibilities. Clogged radiator, clogged cat, or (hope not) blown head gasket. Being that it runs fine and then dies, you may want to look at the cat first, assuming you have one.