Ecu

[dj224ranger]

basic questio where exactly is it located on the 94 4.0? thanks in advance to any help

 

[AllanD]

It's mounted in the firewall, drivers side outboard of the steering column.

Most easily accessed by unbolting the plastic inner fender and going at
it through the wheelwell.

AD

 

[dj224ranger]

ok any different on the 93? or is it the same on most 93-97 rangers
i have a 93 and my buddy has a 94 and his is throwing him all sorts of codes so he had the idea of switching out computers to see if that was it before he bought a new one i dont wanna mess my truck up so i thought if i put his ecu in my truck i could see if it was messed up with out messing up my truck . what do you think

 

[parkrangerjeremy]

the 93 and 94 are in the same place... when they switched to OBDII they moved them in the middle of the firewall above the engine

 

[dj224ranger]

ok thanks

 

[AllanD]

The '93 and '94 computers MAY be different.

a 1993 is a Non-EGR engine with "Batch fire"

SOME 1994's are SEFI with EGR

They MAY be the same, but they may not...

AD

 

[explorerhavok]

Just wanted to point out that if they do not have the same transmissions that will cause other codes to pop up. If you put an auto ecu in a truck with a manual transmission it will be set up for the shift points. From my experience I had an explorer and a ranger both with the same 4.0 and M50D trans and the ECU part numbers were different. Also when I did some research every year has a different part number even if they have same engine/trans