DaveT

Oh, the ECU numbers are all visible on a label located in the center of its cover. Just have to remove the plastic panel, and look. I've never reinstalled that panel....

The shaft seal on the oil pump can be replaced. The fel pro conversion kit has one in it.

Not directly - cylinder to cylinder... I guess depending on what the valve positions are in the adjacent one, compression would get pushed out intake or exhaust. Not sure how that would pick up oil. Leakdown should be interesting.

I took a look in one of the know ECUs the 88 - Quite different from the one I started with. I'll add more info about that tomorrow. Hopefully, we can identify what cars the flatter ones came from, as they don't seem to match the others.

Some things to think about & consider: Exhaust manifold being loose has nothing to do with compression test results. Compression that low should show up as poor running, I would think. Blown head gasket would almost certainly be blowing exhaust gasses into the cooling system. Except, if the 2 cylinders have a leak between them, which would also explain them both having the same low reading. Lots of blow by can push oil up everywhere. How many miles on the engine? Might be worth checking the timing belts / marks for proper orientation.

Here is a list of ECU part numbers and cars they came from / are in. Looking for patterns, and more data from any other out there, if you can read yours and add them, that would be good. GL / Loyale SPFI ECU numbers / versions. Assuming 49 state unless marked otherwise. 1987 2WD 3AT wagon [4WD added] 2261 AA200 MECF – 011 7122 3E Big letter to the left = N Painted ECU 1988 4WD 3AT wagon 2261 AA390 MECF – 021 7805 3C Big letter to the left = 18 Painted ECU 19?? 4WD ?? wagon 2261 AA100 MECF – 001 5Y14 Big letter to the left = E Painted ECU & flatter case 19?? 4WD ?? wagon 2261 AA102 MECF – 002B 6429 Big letter to the left = R Painted ECU & flatter case 1990 4WD 3AT wagon – not 100% sure, just by process of elimination 2261 AA394 MECF – 023 9Y27 G5 Big letter to the left = A9 Gray ECU 1992 4WD 3AT wagon 2261 AA395 MECF – 025 1X03 H7 Big letter to the left = J4 Gray ECU 1993 4WD 3AT wagon - California market 2261 AA395 MECF – 025 2622 H7 Big letter to the left = J4 Gray ECU I have one from a 1987 4WD 5spd d/r wagon, one of the unknown ones. I have one from a scrap yard, probably a wagon, don't remember. I may have another floating around that I can't locate right now.

You are looking for Fel Pro number HS 9392 PT-2 and CS 9390 for the conversion kit. Amazon and a lot of other places sell them online.

Fel Pro have a good reputation in general on here, I've had good luck with them.

I was thinking of getting the power wiring figured out, so I can capture the state of those mode select pins first. I will spend some time on this today. If it looks like the mode uses internal code, pulling the cpu is next.

+1 what ocei77 wrote. Spray does nothing to remove the gunk that is still in there. Wd40 is great at dissolving some types of dried up grease,but it evaporates, leaving the dried up grease...

Ok, didn't know.that. I've had the solenoid fail open, and never noticed any effect while driving. Pretty much any normal conditions of hills, speed etc.

The egr code almost always is caused by the coil of the egr solenoid being open. The only thing it effects is failing emmisions. The others, I have never had. The crank angle sensor is in the distributor.

I'm going to guess, it would fail emissions. Different ECU, and fuel map for turbo vs non turbo.

You can try replacing just the intake gaskets. The best are oem by far.

When was the timing belt and all of the idlers last replaced?

Hi and welcome!

Running for a long time with a failed o2 sensor can burn out that catalytic. Need the CEL code/s to be sure where to go next. I had a 0420 code caused by a very small exhaust leak.

Any possibility of an air leak? A fair amount of old hoses and connections have to be moved to get the maf off. Something may have been distubed? I've not had any trouble with maf sensors.

Back pressure not requited. All the O2 does is adjust the fuel mixture, once the engine is up to normal operating temperature.

No problem, just letting you know

Wait.... that thing could have dual power 4wd... Be a project to sync 2 engines...

Fel Pro head gaskets, head set, and conversion kit. Except use oem intake manifold gaskets. And yes, more answers in old gen sub forum.

Auto vs manual transmission? No difference in engine. Sounds like a fuel delivery problem. Could be the 2 fuel lines are swapped, since they would have to have been removed for swapping.

Plug it. It will run fine. You might not pass emmisions, but it won't hurt anything.

The cable has a flex shaft in the center. This shaft turns continuously at a speed proportional to the wheels. Inside the speedometer, there is a viscous coupling that in turn moves the needle. The needle returns to zero due to a spring. The needle pivots on very fine bearings, like a mechanical watch or a regular analog voltmeter. They can get contaminated and sticky. I doubt lubing the cable will change the sticky gauge problem you are describing. If the cable is making clicky noises that vary with ground speed, that can be helped by lubing the cable.