A mechanic replaced my ECU in 2012. He got one from a jy. So for curiosity’s sake, I looked at it last week.
It has a piece of tape on it that states “AUTO”. I have a manual 5 speed and it works fine, which falls in line with Cruisers posts on the issue.
The original sticker number on it is 56006078. From researching comments on this forum dealing with ECU’s, I see that it works fine in my 87 base unit MJ with the 4.0 L. Apparently it’s an upgrade and predecessor to the #’s 428/429’s.
MY QUESTIONS ARE:
What model year did it come from?
Does it increase the HP in the 4.0 L? If so to what HP?
Does it have the other improvements programmed into the 89 & 90 models with 428’s and 429’s in them?
I just want to know what ECU I have.
Thanks for any help!!