I have 1990 Ram Van B250 with 318cid engine and 3speed automatic with OD.
It just died middle of the run. After that theres not spark or fuel. One year ago from my cars ecu goes down and I buyed new one. Problem was a same kind and now I buyed new one again, but it did not fix the problem.
Where am I going to find the problem

 

Probably the crankshaft, or camshaft position sensors. Get real mopar sensors. These trucks don't really like the aftermarket sensors.

 

That year doesn't have crankshaft/camshaft position sensors. May check if the ASD relay is coming on.

 

Ooops. Probably TBI too......