98 4.0 swap question

[cuz]

Just swapped out engine in 98 ranger 4.0 with engine that came out of 96 or 97 explorer ,engine not firing after swap out used 98 harness and computer do not have computer out of donor vehicle. Can I make this engine work in this truck with some harness changes?

 

[RonD]

The fuel pressure changed around the '96/'97 time, '98 should be 65psi of fuel pressure, thats what the injector specs are for and what the computer expects.

You will have to look up '96/'97 4.0l explorer fuel pressure specs, it could be using 35psi injectors with fuel pressure regulator on rail.
So you may need to swap intake w/injectors from the '98 to the new 4.0l

All you need to get spark is a working CKP sensor(crank position sensor), computer and 12volts at the coil, spark should then be available.
Make sure the CKP sensor located near, and behind the front main pulley was hooked back up, it can be overlooked.

CPS(cam position sensor) is needed but engine should start without it.

 

[cuz]

I changed out the fuel rail and inj. because mine was returnless and donor had return. I have 12vlts at coil and cam sensor nothing at crank sensor should I have voltage at crank sensor?

 

[cp2295]

Did you use your sensors from your 98 4.0? Doubtful it's causing your issue but possible.