[f150fx4]

Hello fellow gear head,
I need to have a question awnsered. I have a 98 f150 4x4 4.2L and i am looking to do a motor swap. The new motor is a 4.2L also but out of a 01 f150 everything apears to be the same except for the intake runner control box on the 98 it apears to have a vac powered ajuster where the 01 has a eletronic box to move the runners. So if you can tell me this. Can I just plug in the new motor or do I have to change the ajuster and the motor wireing harness???
any help would mean alot.
thanks
James
P.S.
Things tried so far
Pulled 2 motors
saw a diffrence
scrached head
got on computer
asked aquestion
sat and had a beer.

 

[Mr Mac]

In looking at the wiring diagrams for both years, the '98 has two intake manifold runner positions and an intake manifold runner control unit and the '01 has a single unit leading me to believe that a change in the wiring harness as well as the PCM would be required as the '01 PCM has two more wire coming out of it over the '98.

 

[Mr Mac]

1998 Schematic

2001 Schematic

 

[f150fx4]

thank you

Thanks for all the help. I really appreciate it. It was not the easy plug and play answer I was hoping for but it is still better then having to pull the motor ack out.. thanks again
James

 

[Mr Mac]

No problem! Just chime in if you have any other questions!

Mac