I swapped a 4.3 litre engine into my 85 jimmy witch worked good but had trouble with the carb so i put a throtle body injection system out of an 88 chevy van. If i pour gas down the throtle body it runs but i can't seem to get it to fire the injectors to get fuel to it. I have a wiring diagram from both units and it lokes to me that all the wires are connected but i must be missing something. Any help would be appreciated.

Might wanna try asking in the GMC Jimmy forum also. A lot of good info in there.