ECU swap

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MOOSE16285

NAXJA Forum User

Location

Memphis, TN

• Dec 28, 2005

• #1

Got a few questions... I got a 1990 Sport 4.0L 4x4... I bought a new ECU from a 1990 4.0L Cheif... Are these two swappable?

I have no idea if that Jeep was 4x4, would this affect the compatibility?

Does anything about the t-case/4WD every run any kind of input or "speaks" to the ECU at all?

If so will this cause problems if the original Jeep was 2Wd and I put this in a 4WD?!

Some of yall have helped me before so lemme remind everyone who I am... Take a look...

 

sidriptide

nobody of any consequence

Location

western massachusetts

• Dec 28, 2005

• #2

as long as the full drivetrain of both vehicles matches i'd expect it to work. i'd be more concerned with the tranny matchng. the 2WD / 4WD issue could be a problem but i have no idea.

 

M

MOOSE16285

NAXJA Forum User

Location

Memphis, TN

• Dec 28, 2005

• #3

both are automatic... anything in particular am I looking for in the two trannys?!

 

sidriptide

nobody of any consequence

Location

western massachusetts

• Dec 28, 2005

• #4

MOOSE16285 said:

anything in particular am I looking for in the two trannys?!

Click to expand...

that they are the same, as opposed to manual vs. automatic.

 

M

MOOSE16285

NAXJA Forum User

Location

Memphis, TN

• Dec 28, 2005

• #5

So, unofficially, since both are 4.0L autos I should be, and hoping, I'm okay to continue with the swap once the new ECU arrives... Awesome, if I find anything out I'll let ya know and if you or anyone else has anymore ideas lemme know! -MOOSE

 

langer1

NAXJA Forum User

Location

Mineral City,Ohio

• Dec 28, 2005

• #6

MOOSE16285 said:

So, unofficially, since both are 4.0L autos I should be, and hoping, I'm okay to continue with the swap once the new ECU arrives... Awesome, if I find anything out I'll let ya know and if you or anyone else has anymore ideas lemme know! -MOOSE

Click to expand...

If there both automatics your good to go.

 

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outlander

NAXJA Forum User

Location

Columbus,Ohio

• Dec 29, 2005

• #7

Just out of curiosity......Did it run at all after that bath?or was the computer completely dead?

 

langer1

NAXJA Forum User

Location

Mineral City,Ohio

• Dec 29, 2005

• #8

jeepdeepfreak said:

Just out of curiosity......Did it run at all after that bath?or was the computer completely dead?

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Deader than a door nail

 

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outlander

NAXJA Forum User

Location

Columbus,Ohio

• Dec 29, 2005

• #9

hmmmm...maybe I'll add a spare ecu to my trail spare list.....just kidding.

 

M

MOOSE16285

NAXJA Forum User

Location

Memphis, TN

• Dec 30, 2005

• #10

It ran for about five mionutes underwater... That was my mistake there... After a week or cleaning it out and replacing parts it finally turned over but no spark...I'm replaced alot of things so now its the ECU's turn to get swapped... It was completely under.... Here's a pic from the inside...