Roost

For what it's worth I must of broke something loose in the original harness. Exchanged harnesses from the 00 engine and everything is back to normal. What a relief.

Hello all, Having some issues after the swap. Truck is a 99 manual and the new engine is 00. Truck was running fine before with the p-pump now it wont charge or tach. Original ecm, sensors, and harness being used. Wait to start light comes on like it should. Fuel pump will cycle on ignition then wont come back during cranking. Map, AIT, oil, crank, and cam sensors are all getting 4.9v. Wish it was easy to just delete the ecu. Any diagnosing methods I should be doing? Help is greatly appreciated.