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Re: Seeking help from those who might have insights ...
sounds like a wiring problem to me. if you get no ce light then the pcm is likely not getting power or ground on a particular circuit. i would pull it down and pin out the power and grounds when the problem is happening. if all powers and grounds are good check for 5v reference voltage at the tps. if no reference voltage check for 5v at the computer. if no 5v at the computer pcm is most likely bad. pcm failure is rare in any car so i would bet on loss of power or ground to the pcm.
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Current Stable:
1992 SVX
1979 K5 Blazer Cheyenne
1956 Plymouth Belvedere - Daisy
1967 Chevy C20
1953 Chevy 210
1969 Plymouth Satellite
1949 Chevy Thriftmaster
1959 Chevy Apache
1951 Chevy Stepside
1969 Chevy Camper Special
1978 Ford F150 w/ stroked 460
1986 Volvo 740 turbo wagon
1999 GMC 2500 Creep Van
1994 Impreza Outback
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