Motor drops power

[Roert42]

It's a .pdf

 

[bobbywalter]

Aya....not good with phone Internet stuff


One more assumption .....not spark knocking....shitty fuel will pull timing too....or maybe if it's unplugged.

 

[Aaron285]

No. everything is new on the fuel and spark side, It may have a mismatched PCM or bad MAF. It is 100% an electrical/ sensor/ computer problem. ECM is brand new for a 91 4.0 manuel 4x4, motor and all electrical came from 91 4.0 Auto 2wd.
Truck was fully rebuilt, frame off resto.

 

[Roert42]

The truck is a manual trans? Same manual trans that the donor ECU is configured to work with?

Could the wiring harness be missing something for the manual trans?

 

[Aaron285]

This is the pcm. The ECU is new and is for a 91 4.0 Manuel 4x4

 

[Aaron285]

How do I get codes to pin point the issue?

 

[Aaron285]

I pulled codes: They are 85 and Then blinked 1 (5) times.

 

[Roert42]

So I checked my book on ford EEC IV trouble codes. The First code, from the Key off Engine off test, is either "Canister purge circuit failure" or "Shift solenoid 3/4 - 4/3 circuit failure"

 

[Roert42]

I think the flashing ones are just saying there are no stored codes, but it say you would get either two ones or three ones.

 

[Aaron285]

So I checked my book on ford EEC IV trouble codes. The First code, from the Key off Engine off test, is either "Canister purge circuit failure" or "Shift solenoid 3/4 - 4/3 circuit failure"

What do those mean??