Hey all. I've been sorting out an issue with starting and running. After tracking down and sorting through all of the pretty common stuff and stumping a mechanic, I think I've narrowed it down to the computer (by hitting it with a hammer of all things).
This week I was finally able to get the ECM out from under the dash. When I opened it up, it wasn't what I was expecting from all of my reading and research.
It's the Renix model in the (cast aluminum?) box. It's missing the longer sticker on it with the part number 8953005023, but still has the smaller sticker with number S100801103A.
Looking at it, it's really clean and no obvious signs of damage or burnt circuits. Obviously that doesn't mean too much, as there could be bad caps, or whatever, and I noticed what seems like dried water in one corner (a whiteish powder), but with all of the recent rain, the internals are bone dry. If there were a recent water leak, I would expect to find some moisture.
Anyways, enough with the background on this. What I'm looking to get information from you fine folks about, is ECM model number compatibility.
I've found and ordered a replacement ECU/ECM that looks the same, with an almost same part number. Like I said, my current model is S100801103A, and the replacement is labeled S100801103C. Are they a match, and what, if any are the differences. In doing a search on google, I've found limited results, with my main source of information being mentions of the "C" model being for wranglers, but nothing being said about the "A" model, or the differences between the two.
My jeep is an 87 TBI 2.5L 5 Speed Manual, and the replacement I've ordered is for a 2.5L Fuel Injected 2.5L 87-90. It's unclear to me if FI and TBI are synonymous for this engine in these model years.
For what it's worth, this model was manufactured in Canada and is California emissions certified.
This week I was finally able to get the ECM out from under the dash. When I opened it up, it wasn't what I was expecting from all of my reading and research.
It's the Renix model in the (cast aluminum?) box. It's missing the longer sticker on it with the part number 8953005023, but still has the smaller sticker with number S100801103A.
Looking at it, it's really clean and no obvious signs of damage or burnt circuits. Obviously that doesn't mean too much, as there could be bad caps, or whatever, and I noticed what seems like dried water in one corner (a whiteish powder), but with all of the recent rain, the internals are bone dry. If there were a recent water leak, I would expect to find some moisture.
Anyways, enough with the background on this. What I'm looking to get information from you fine folks about, is ECM model number compatibility.
I've found and ordered a replacement ECU/ECM that looks the same, with an almost same part number. Like I said, my current model is S100801103A, and the replacement is labeled S100801103C. Are they a match, and what, if any are the differences. In doing a search on google, I've found limited results, with my main source of information being mentions of the "C" model being for wranglers, but nothing being said about the "A" model, or the differences between the two.
My jeep is an 87 TBI 2.5L 5 Speed Manual, and the replacement I've ordered is for a 2.5L Fuel Injected 2.5L 87-90. It's unclear to me if FI and TBI are synonymous for this engine in these model years.
For what it's worth, this model was manufactured in Canada and is California emissions certified.
