Hello 98 Blazer is acting up for two weeks when the motor gets to about 180 it would cut out just die and you could restart drive a little farther and it would die again after 4-5 times it would not restart no spark. Let it cool down and it would restart. I changed all sensors still the same. I discovered the crank sensor hitting reluctor wheel. So I changed the front cover because it was a dorman, ATP or Pioneer to GM cover and the oil Pan gasket. I took the front axle out so after I got the engine all bolted up and sealed I started the Blazer it ran prefect for 15 mins as I was getting the air pocket out of cooling. Turned Blazer off and installed axle and all the rest of the parts. Tried to restart and no spark. I have changed the cam sensor in distributor, the coil, CSP sensor and ICM I am at a loss. I have seen the post for wiring diagram to pcm for 96 but am not sure which connector of the 4 it is. How can I tell if the PCM is bad now?

 

I have found a DTC P1626 Theft Deterrent Fuel Enable Signal Not Received code now after disconnecting battery to finish hooking up 4 wheel actuator under battery and reconnecting battery to get no spark and this code. How to reset?

 

I think I figured out the P1626, it was because I had the fuel Injectors disconnected. but still no spark no run.

 

After a long day off rechecking everything I did and ohm's reading all the wiring back to PCM for the crank, cam sensor, Ignition control module. Started the truck and it ran so I started to play with all the wires to everything and found the Ignition Control Module terminal plug to be faulty. I guess from all the heat the Ignition Control Module generates it has distorted the plugin because I have two modules and both stall out when terminal is wiggled.

 

Glad you found it! Also, thanks for reporting back on what the cause was. This is bound to help someone in the future with a similar problem.