So I have completed a E4OD automatic to a ZF42 5 speed manual transmission swap. I did swap out my harness with the 5 speed one to eliminate all the extra plugins the automatic one had. But I never did swap out my PCM (powertrain control module) Since i've been driving it i'll get a check engine light come on after driving it a while. I checked the codes coming up and there all related to transmission temperature out of range. Being a manual transmission there are no inputs of transmission temperature. So the computer is not getting a reading therefore triggering the check engine light. I've shopped around for a 5 speed 4x4 PCM but when i swap it out. The engine will not start.

My PCM number for the E4OD is (F4TF-12A650-AAA)

and the one i've tried from the 5 spd is (F4TF-12A650-AVA)
I've tried 2 of these PCM's as well and same results with both.

What am i missing???? Why won't this 5 spd PCM start my truck? There both for a 5.0L 4X4 as well

 

You did wire up the nss right?

 

I don't believe it has a neutral safety switch. Its got a clutch switch where the clutch has to be pushed in to crank the engine. There is a switch on the drivers side of the transmission but i believe that is the reverse light switch. There is no other switchs on the transmission but this one.

Does anyone have a 1994 F150 wiring diagram. I need one from a ford manual not a haynes or chilton manual there not detailed enough.

 

The engine will not start.

Could you expand on that just a tad.

When you say it won't start, does that mean it cranks but won't run? or that it will not crank, nothing happens when you turn the key to "start"?

If it will crank but not start does it have any spark? Does it cycle the fuel pump when key is turned to "run" position for about a second? have spark and fuel pressure is up to spec but no fire? If so then can you feel the injectors actively clicking away?

 

It cranks over fine. After rolling it over for a long time it will fire slightly and will run on a few cylinders for a few seconds then die.

Is there a neutral safety switch or jumper wires somewhere i'm missing?

 

It turns over so its not a neutral safety switch type of issue, something like that would only prevent turning the motor over attempt to start it.

Your statements "After rolling it over for a long time it will fire slightly and will run on a few cylinders for a few seconds then die" suggest the wrong computer "batch / sequential fired swapped in for example or a user damaged computer was tested. Odd you'd get two but that also depends on where from and who's working those numbers.

I don't have the data to say if its correct one or not, one of the others would have to comment on that aspect.

 

That was my first impression was i had the wrong computer therefore altering my firing order and making it barely run on a few cylinders. I went to the autowreckers and they gave me one and came home and tryed it and the same thing. I then compared the numbers and its the same as what i already had. Then i looked it up online and they list it for a 5.0L which is what my engine is. So figured i might have other issues.

F4TF-12A650-AVA
JOY0

Listed for a 1994 F150 5.0L 4x4

Also need help making my backup lights work, do i have to switch some pinout in my connector to make them work? I'm running the standard transmission harness. Does anyone got a wiring diagram for a 1994 F150 or know where to get a ford one?

 

Still never got this issue resolved and have been dealing with the check engine light. But time to revisit it. Does someone have the pin out wiring diagram for the PCM connector at the firewall for a 1994 F150 5.0 4x4

Manual and automatic wiring diagram. I read on another forumn someone else had the same issue as me. He ended up putting a mustang ECU in it but with some modifications.

 

Is your truck MAF or SD?

 

Truck is MAF

 

Well that explains it, MAF uses sequential injection while SD is batch fired and you were likely given SD computers which only has 2 injector outputs and hence only 2 injectors fire. What you need then is a sequential MAF computer for a non computer controlled transmission, those are rare in trucks so you would probably be better off with a Mustang computer though that will require repinning the EEC connector. Here is a chart showing the differences between a MAF truck and Mustang, you would want to verify these wires on your truck of course.

 

Awesome information, this makes sense. I thought 94 and newer were all MAF but I guess I'm wrong. I wonder if it might be easier to get a chip for the PCM that deletes the transmission inputs/outputs

 

Most were but most were also automatic trucks.

Worth investigating for sure but support for these old trucks was always slim and it's fading fast.