Gen II (US/NA) are 92-97. Gen II.5 is 98-00.

Engine through 93 was 3.0 12V for both LS (flatty) and SR (plastic flares), also had RS in early years. 94 LS was still 3.0 12V while SR was 3.5 24V DOHC.

95-96 were 3.0 24V SOHC in LS and 3.5 24V DOHC in SR.

97 was odd in that is was still LS/SR but both now had the 3.5 24V SOHC.

Then 98-00 are the Gen II.5 with the blister fenders and all with 3.5 24V SOHC.

Manual trannies were never behind 3.5s in the US. The 91-94 3.0s had the same tranny, then 95-96 is different. The later ones have a t-case that is more like the bigger SR/3.5 cases, i.e. the earlier MT t-cases can take 2.85 gears and the 95-96 could be fitted with 3.15.

Pretty sure I got all that right... <img src="/forums/images/graemlins/patriot.gif" alt="" />

I'm trying to go from A/T to M/T so I don't keep track of the A/T TCU stuff other than to figure out how to circumvent it.

Still waiting for the '97 Montero FSMs. Those won't be in until the end of next week. <img src="/forums/images/graemlins/frown.gif" alt="" /> So, I can't check anything unless someone can come up with electronic copies of Volume 1 and Volume 2. Not on Links. <img src="/forums/images/graemlins/frown.gif" alt="" />

The 5-speed didn't show up in the Sport until 2003 in the 3.5L Limited AWD. I have one and it has a PCM. The ECM and TCU are combined in one unit - the Powertrain Control Module (PCM). All the 5-speed A/T Monteros I saw this weekend were PCM based.

Integrating a '99+ PCM into a '97-'98 (or earlier) Montero or Montero Sport becomes increasingly difficult even if you replaced all the electrical harnesses in the process. A/T, A/C, fuel measurement, security, ABS, SRS - lots of things either stopped having separate control units and were integrated into the PCM or became tightly tied into the PCM. Sensors changed and are incompatible with earlier PCMs. Or sensors went away altogether.

I did notice on the '98 ECM that they had the "data link connector (2)" ECM flash pin. This is a really good thing as that indicates that the '98 ECMs are probably flash-able. If that's the case, maybe this would be a good summer/fall project. Pull a ROM and get the Tactrix guys to put something together. Once we have the ROM, all that has to be done is build the XML definition file to go with it.

Be nice to be able to disable ABS control and the two A/T lines. That'd leave the P/N switch and 4WD detection which are just wiring changes.

Edward

Thanks! This was a huge help!

This is what I came up with over the weekend.

3.5L SOHC A/T Montero ECM (FED)
1997 MD338137
1998 MD343513
1999 MD361885
2000 MD365261

For reference, the 92 pin (4-plug) and 100 pin (3-plug) ECUs are ECMs (no integrated TCU). The 130 pin (4-plug) ECUs are PCMs (integrated TCU).

I didn't see anything that differed between the FED and CAL ECMs on the '98 besides the four additional pins for the two extra O2 sensors - but I wasn't looking, either, so ....

I did run across documentation in the '98 FSMs regarding Long Term Fuel trims which I've suspected for years and a few others have sworn up and down was the case.

According to Mitsu, LT fuel trim is generated using BOTH the pre and post CAT O2 sensors. Which means, if you have a CAT going bad its going to hork up fuel delivery.

Funny. This contradicts what a couple of the techs have been telling me for years - that the post-CAT O2 has nothing to do with fuel delivery, only emissions. Yea, sure. That's why every time the rear O2 sensor starts going south my Sport runs like crap and the mileage tanks. <img src="/forums/images/graemlins/rolleyes.gif" alt="" />

Well, surprise, surprise. <img src="/forums/images/graemlins/rolleyes.gif" alt="" /> Sounds suspiciously like the problem I've been chasing for the last 8 months. No matter WHAT I do or replace, LT fuel trims don't look right and mileage keeps deteriorating, while the engine continues to run better and better. And, it stinks - which it usually never does no matter how bad it runs. Hmmmmm.....

Edward