I have a 96' Ford Bronco 5.8 EFI. The engine in this truck had a blown head gasket so I swapped it out to an engine from a 92' F-250 p/u. The old engine ran and started fine. When I swapped out the motor, I removed all the old EFI from the 92' block and wiring sensors etc and used all the sensors, intake, EFI, from the 96' which all bolted up to the 92' block. I installed the engine and it cranks when I turn the key and I can hear the fuel pump activate when I turn the key, however I cannot get this truck to fire. If I spray starting fluid into the EFI ports and turn the key to start, the truck will fire. I have changed the fuel filter along the frame rail and have verified that I am getting fuel at the check valve along the fuel injector rail.I cannot figure out why this engine will not fire on it's own. I believe the timing is proper as I lined up the TDC @ 0 degrees and pulled #1 plug and the piston is @ TDC and the rotor is pointing to #1 plug wire. I have a tester but the plug @ the EEC connector does not match up to the tester plug. Any help with this would be greatly appreaciated I have 2 manuals for this vehicle but as of now I am wracking my brain trying to get this truck running and the wife is ripping me about the truck not running. (it is her vehicle.) The engine I removed always started fine and the engine I purchased also started when I purchased it. I did have to swap out the crankshaft pulley and the crankcase sensor from the 92' and bolt up the pulley and sensor from the 96' because they are different. I believe that this should not be a problem however I am not sure. All the proper wiring, sensors, vaccum lines are connected properly. I must have gone over this at least 20 times.I did not mention this but this truck will only run when I spray the starting fluid into the EFI ports as soon as all the ether is everapoated the truck stalls and will not fire. I have also tried with no luck to get a fuel injector test light to try to test if there is any power to the injectors but can only find the tester for the throttle valve body models. PLEASE HELP!!!!!! This is very frustrating.

 

Jump the fuel relay with a wire so the pump runs with out the computer telling it to, and try starting it. If it starts up than you know a sensor is not working - only pumps fuel when the computer knows the engine is running.

 

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How wold I do This Im not sure what relay to jump or where it would be located.

 

Relay is in the fuse block under the hood. In front of the master cylinder.