I recently swapped a 4.0 into my YJ, used the same harness and ecu from the engine. I redid the bulkhead to my underdash wiring, I have the fuel pump solenoid working correctly along with the pump itself. I was able to drive the jeep i got it out of before i took the engine out. I converted ev erything used same flywheel and kept the CPS on there but it is not starting. I never messed with the distributor or wires. Thanks
No i can hear the pump and when i had the pump out it put out a pretty good amount of pressure when I would pressure test the new lines with it. But I came down to the issue of vacuum. I am only getting about 5lbs and I have every plug i can see on the engine and the diagram plugged and still getting the same pressure.