Hey guys, I need help again...
Background...I have a 1994 Wrangler with the 2.5L, 5 speed manual in it. Ran in until ~203k on the clock. New engine time came and I chose to stay with the 2.5L (yes I know some will chuckle) but honestly the four squirrels always did what I asked them to do, it was in my price range, and I was hoping it would be something fairly simple and would be heading back down the road. The last statement is anything but true.
Long story short it's been in the shop for the last two months, they can't get it to start on a regular basis, sometimes it will and sometimes it won't, doesn't appear to be any rhyme or reason to it. The shop has replaced nearly every electrical component on the Jeep, made new grounds, sanded the grounding spots, checked the entire harness out of the loom etc etc.
They are suggesting I may have a bad ECM (I had done the "brain" surgery on my ECM a couple years ago and it has worked great!) Anyways, I'm fortunate to have several Jeepers in the area that are willing to part with their ECM from when they did an engine swap and eliminated it.
My question is (and I searched through over 10 pages of posting before making this one as I don't want to waste anybody's time; so I apologize in advance if I missed it or didn't hit the right crawlers) does the part number on my, currently installed, ECM have to match the one I put in it? Before I purchase one from somebody I would like to make sure it will work... My ECM has a part number of 56028289, the dealer said the only ECM that would work would be this one or 56027575; is that true? Unfortunately those who have offered me an ECM don't have those part numbers.
As always your help and expertise is greatly appreciated!!! My wife may off me if I don't get her on any Jeep rides this Summer and it's coming to an end quick. Heck in Ohio Winter may be here tomorrow, who knows.