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.

 

Check the firing order. I think it changed sometime around 93 or so at least on the 302's. I would assume it did on the 351's as well. The firing order for the 96 electronics may be really off from the 92 engine cam timing. Like I said, I know the firing order changed at some point for the 302's (i.e. I ran into a difference while changing plug wires on a 95. Ran the wires the same as on my 91 and it wouldn't run.)

Good luck.

 

Isn't 96 the first year of the obd-ii computers? I don't know, but I wouldn't expect the newer computer to immediately work with the sensors/etc from an older vehicle.

just a thought. Good luck.


edit: i read that wrong, i thought you took the sensors from the 92 but you didn't. On another note, did you try pulling the codes?

 

Check the fuel pressure with a gauge! You don't have enough fuel as proven by application of starting fluid that starts the engine.
Having it bleed out the test port is different than having it at 40 psi. for the injectors to use.
Both the 5L "HO" and the 5.8 are the same fire order.
All non HO 5L engines have the old 302 fire order right up into the early 90s and don't have mass air.

 

As I stated, I did try to connect up a tester to read the codes to this vehicle but the connector @ the EEC Module does not match the plug on the Ford tester that I have. I did purchase a noid tester and have verified that the injector plugs are all receiving power @ the plugs.