2001 Savana 4.3 with 223,000 mi. acting up again, has new ICM,coil,cap+rotor,pickup coil under cap,wires+plugs, crank and cam sensors, bat+alt,fuel pump+filter, oxygen sensors ....cranks over wont start. has fuel pressure no spark from coil.... ran fine, all new parts added at different times while I was trying to do a self diagnostic and each time started ran for a few days and would do the same, just shut off and crank but wont start. While trying to start I checked all wires and wiggled to see if it was a connection problem....could it be the computer ???

 

You replaced all those parts, yet you forgot the most common thing to check first... your fuses and relays

 

More than likley not the computer. Recheck wiring, and with key switch on, do you have voltage to the distributor?

 

I did check the fuses and relays I broke down and took it to Darby GMC in Venice and found out the ICM was bad because of a short in the wire leading to it $575 later and it starts and runs fine. I had no way of knowing without a computer diagnostics.... Thanks guys for the replies