mycargoesvroom

Yes I'm using the intake from the 2001 Auto. I've checked the part number on my IACV vs one on my friends 99 OBS 5-speed and they're the same. I'm wondering if the pin outs might be different though.

Forester ECU came in today and although I was 100% sure it wasn't going to fix my issue (I'd actually convinced myself it probably wouldn't even start), I put it in. Well to my surprise she started right up again. I hopped in and drove about 2 miles to get the codes checked and she drove smooth as butter, no hesitation, no bucking, nothing that I could feel out of the ordinary. Checked the codes and no surprise I got the same codes as before. So I erased the codes, reset the ECU and hooked it up again. This time I only got 1 code, 1516 (same as one from before). The only thing notable other then that is that it DOES NOT like having the A/C on. When cruising it's fine but as soon as you push the clutch in she wants to bog down and die out. I'm assuming that has something to do with the IACV not functioning correctly. I'm still going to change the timing stuff I just wanted to report how the car reacted to the Forester ECU.

+1 for Rit. Did it on my old Legacy GT and it came out great.

Thank you John. I have the cam/crank gears already as well as the rest of the EJ22 I removed from the car. I wish I had known all this prior to putting the new motor in haha.

Thanks Kyle. It'll all work out in the end.

Yes John, you're mostly correct. The engine harness was still on the EJ251 when I bought it, so when the EJ22 came out with it's harness, the EJ251 went in with its harness. That is the ONLY wiring that is not original to the car. The harness that plugs in to the engine harness from the ECU has not been altered in any way. I don't know why I didn't think about the harness coming from an Automatic, which makes perfect sense. Haha I actually tried. I signed up for an account here a week before I bought the engine but wasn't able to post anything Edit: Reading through my posts I realized I may have come off a little arrogant. I've been overloaded with mixed information and my frustration with the situation is leaking out at you guys. It wasn't my intention at all and I apologize if it seemed that way.

So I don't need to swap the intake mani, harness and such from the EJ22 to the EJ25 like GD was saying?

It's not just changing a timing belt. I'm sorry I don't have even 2-3 hours at a time most days to dedicate to working on it. I'm a stay at home dad actively searching for employment so my time is very limited. I was simply looking for an alternate solution to save me time and get my car on the road as soon as possible. With all of this said, will I need to purchase a new tensioner?

That is what I did. Engine harness is from the EJ251 which was removed from a 2001 Forester. I didn't swap transmissions and the ECU I'm using is from a 5-Speed RS. I've driven the car and I have no idea why the ECU was looking for a TCU. I was on the fence about buying the ECU for that very reason. If it doesn't work, well then I know.

I'm not using an automatic ECU. I don't know why those codes randomly came up but they were not there originally, and they're gone now.

Engine harness is complete, no splicing needed. Everything plugged right in.

I wish I did have it, would make things much easier haha. I just picked one up on ebay for $45 shipped. Thank you for your input, I really appreciate it. Everyone keeps saying "Just swap the timing stuff, IM, EJ22 harness on the EJ251 and call it a day". Although I know it's an option, maybe something I end up having to do. I'd really rather not. I don't get much time to work on the vehicle and a job like that could end up taking me a week.

I did that at first and it wouldn't start with the EJ22 ECU. I had air, fuel, spark but no fire. I swapped in the ECU from the RS and it fired right up but of course with issues. I'm thinking using a Forester ECU will fix it but I'm concerned about how the Forester ECU will work with auxiliary wiring in the body harness (IE Taillights, Headlights, windows etc).

Ok this is kind of a long story so I'm going to cram as much info in as little space as possible. I bought this car knowing it needed work. It started off as a simple head replacement and developed into a swap once I realized the rings on a few cylinders in the EJ22 had gone bad. My car: 2000 Impreza Outback Sport Phase 2 EJ22 SOHC 5-Speed My donor motor: 2001 Forester Phase 2 EJ251 Automatic. ECU: 2000 RS EJ251 Engine harness is from the Forester motor. I installed the 5-speed bits into the EJ251 and installed it. It would crank and crank but no start. Had spark, fuel and air but wouldn't turn. Read that the cam/crank triggers were different between my EJ22 and the EJ251 so I replaced my EJ22 ECU with one from a 2000 RS equipped with the same motor and the car fired right up, with a CEL. Driving the car was terrible so I gimped it to get the codes pulled. Idle Air Control Solenoid - P1512 (signal 2 circuit low input) - P1514 (signal 3 circuit low input) - P1516 (signal 4 circuit low input) P1111 Atmospheric Pressure Sensor High Input Symptoms: Slightly rough idle Hesitation/bogging under load (usually around 2-3k RPMS. If I put my foot into the gas it bogs, then takes off like a bat out of hell) I replaced the IACV with a unit from a working car. With the new (to me) IACV the idle now surges between 1500 and 3000 RPMS. Hesitation is mostly gone while driving, but still present. Re-install "old" IACV and idle returns to an almost normal (still slightly rough) 900rpms and holds. Unplug either IACV and nothing changes, it either idles rough with the old one, or surges. The car the ECU is from was equipped with the Atmospheric Pressure Sensor on the passenger side strut tower. The Forester from which the engine came from did not have the sensor on the strut tower from what I can tell so it must have been in the ECU as there is no wiring on the engine harness for one. Last night I took a friend/fellow enthusiast out for a short drive since I was having trouble describing the issue. The car hesitated slightly at first, and then evened out and drove (seemingly) fine. Today I take the car to get the codes pulled again and it's the same old sluggish, hesitations under load. On top for that, this time I'm getting the same codes as above, plus these two oddballs. P1116 - Torque down prohibition output (low) P1722 - Automatic transmission Diagnosis Circuit High Input This wouldn't be strange if my car/ecu was automatic. I understand Auto/Manual ECU's are the same aside from pinning, but can't figure out what would cause it to suddenly throw those codes all of a sudden. Any thoughts how how to resolve these issues would be greatly appreciated. I've worn myself out reading threads trying to fix this with no avail