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Thread: Why will my engine not go in?! Update! Need help!

  1. #61
    t3h ub3r m3mber lord flashheart's Avatar
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    Re: Why will my engine not go in?!

    Like I said most of the time that's those stupid alighnment dowels, that's why I took mine out....jk
    No, no ,no I'm not insulting you, I'm describing you!

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    Re: Why will my engine not go in?!

    OK. Everything is in and hooked up except a few things I couldn't figure out.

    First is this purple plug and the coolant line behind it.


    Second is the coolant fitting coming off the TB


    Does the one under the intake manifold hook to the TB? What's the purple plug go to?

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    Re: Why will my engine not go in?!

    I believe all of that is for the Air Assist. The purple plug hooks into the air assist solenoid, I think the "coolant line" in the first pic is one of the nipples for the vacuum side of the air assist port, I think there should be one coming off each intake runner near the injectors and the nipple on the TB assembly is the fresh air supply to the solenoid.
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    Re: Why will my engine not go in?!

    The tube in the first picture is between the power steering and alternator. Is the solenoid under the manifold on the passenger side?

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    t3h ub3r m3mber 02_Legacy's Avatar
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    Re: Why will my engine not go in?!

    This is where it is supposed to be

    Do you know if your old engine had the air assist? I know you are trading a 2.2 for a 2.5 and I am not sure if any of the 2.2's had air assist. Is the wiring harness from the 2.2 or the 2.5?
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    Re: Why will my engine not go in?!

    Yes I took the Phase II EJ22 out and replaced it with a Phase II EJ251. There is nothing on either intake manifold that looks like the picture above.

    Oh, and 2.5l engine harness.

  7. #67
    t3h ub3r m3mber 02_Legacy's Avatar
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    Re: Why will my engine not go in?!

    Ya looking at your MRII thread I see this pic:

    No air assist solenoid in this pic. Are you changing ECU's or not. If not your 2.2 may not care if it is there or not. If that is the case just plug the ports on the intake manifold. Other wise if it is not there and the ECU is looking for it it will set a CEL and can cause running problems.
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    Re: Why will my engine not go in?!

    There are no ports on the IM for any of that lol.



    Looks like I'm missing the whole solenoid. But since the ECU isn't going to know the difference I'm going to cap both of them off and see what happens.

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    t3h ub3r m3mber 02_Legacy's Avatar
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    Re: Why will my engine not go in?!

    ya now that i think about all the other ports (one on each runner near the injectors) will be there but there will be a hose attached to them. all those hoses converge to that one port that you found near the purple plug, regardless if you block off both ports you should be good.
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    Re: Why will my engine not go in?!

    Thank you for your help! I should have had it up and running tonight but I wasn't sure about that stuff and on top of everything else I lost one of the fuel lines near the strut tower.

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    Re: Why will my engine not go in?!

    Ok everything is back together but I can't get her to start. It's cranking but it just wont go. I'm about to change the plugs (all though I did check the old ones and they were sparking) in the hopes that it just isn't getting enough spark. What else could I be missing? All sensors/lines are installed and accounted for.

    Thanks!

    Edit: I'm getting spark, and fuel but no start. It cranks, then stops, cranks, then stops. It almost seems like the starter is hitting something? Is it possible not having the air assist solenoid is causing an issue? It seems to give air to the fuel injectors?

    Idk... I'm so frustrated and defeated at the moment.

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    Re: Why will my engine not go in?!

    Here's a short video. When you hear the car stop cranking it's doing that on it's own.

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    Re: Why will my engine not go in?!

    did you check the timing belt at all? Could be the timing is set incorrect. Also could be crank/cam sensor causing it to fire at the wrong time. I don't know too much about this 2.2 to 2.5 swap so was everything plug and play? are you sure the sync pulses are the same between the 2.2 and 2.5 for both the crank and cam sensor?
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    Re: Why will my engine not go in?!

    Quote Originally Posted by 02_Legacy
    did you check the timing belt at all? Could be the timing is set incorrect. Also could be crank/cam sensor causing it to fire at the wrong time. I don't know too much about this 2.2 to 2.5 swap so was everything plug and play? are you sure the sync pulses are the same between the 2.2 and 2.5 for both the crank and cam sensor?
    I think the triggers on the cam/crank gears are different between the 2.2 and 2.5. I'm going to pick up an ECU from an EJ251 tomorrow and hopefully that does the trick.

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    Re: Why will my engine not go in?!

    You should pick up the air assist solenoid also then, otherwise you will have a cel and and the engine will be lean during tip in.
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    Re: Why will my engine not go in?!

    Quote Originally Posted by 02_Legacy
    You should pick up the air assist solenoid also then, otherwise you will have a cel and and the engine will be lean during tip in.
    Good call!

    Quick question. Since the OBS and the RS are the same minus the motor there's no reason to worry about any wiring issues right? Since I'm using the same ECU that would have come with the EJ251 in a car that's almost identical?

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    Re: Why will my engine not go in?!

    IT LIVES!

    Swapped in the ECU from an EJ251 and it fired right up! Runs like dog poop, has a CEL and the clutch is slipping but it frickin' runs!

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    Re: Why will my engine not go in?! Update! Need help!

    Symptoms: Rough Idle, No power, Hesitation while accelerating.

    Codes:
    Idle Air Control Solenoid
    - P1512 (signal 2 circuit low input)
    - P1514 (signal 3 circuit low input)
    - P1516 (signal 4 circuit low input)

    P1111
    P1111 Atmospheric Pressure Sensor High Input

    I don't have an APS as far as I can tell. If I do it's in the ECU. I cleaned the IACV with carb/choke cleaner and a q-tip with no luck. I unplugged the MAP and bam, smooth idle and returned drivability. Since the codes are for the IACV I assume mine is bad and removing the MAP puts the car in "limp" mode and the ECU ignores the bad IACV. Sound about right?

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    t3h ub3r m3mber 02_Legacy's Avatar
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    Re: Why will my engine not go in?! Update! Need help!

    The ECU can never ignore the IACV limp mode or not. Quick test to see if the IACV is working or not is to turn the A/C on and off at idle. If the revs drop very slightly and then raise a little when the A/C kicks in the IACV is working properly. If the RPM's just divebomb when the A/C kicks in then it is not working. And IIRC the atmospheric pressure sensor is part of the MAP sensor.
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    Re: Why will my engine not go in?! Update! Need help!

    I did this swap last year on my friends 96 2.2 (5spd) legacy. He scored a good running phase 2 ej251 from an 01 impreza. This is what I did we used all his stock 2.2 engine wiring harness to the phase 2 2.5 engine. We got everything working good except for the iacv. I just need to custom plumb his old 2.2 iacv (that was bolted into the old manifold) to the phase 2 intake manifold. The phase 2 iacv is actually on the throttle body. Were actually using his old 2.2 ecu also. He daily drives it and only gets the iacv code.

    Phase 1 iacv is on the manifold (3wires) and tps sensor is also 3wires while the phase 2 iacv is on the throttle body (4wires) and the tsp sensor also have 3 wires. Even if you use the ej251 phase 2 engine wiring harness and ecu, the harness that goes to the ecu don't have the extra wires. I would suggest you use your old engine wiring harness. Let me know and I'll explain all the things we had to do to make it work except for the iacv

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    Re: Why will my engine not go in?! Update! Need help!

    What year car is the engine on again? I'm thinking you have a 2nd gen legacy (if i remember correctly from your avatar)

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    Re: Why will my engine not go in?! Update! Need help!

    Quote Originally Posted by r3v_v3ng3
    I did this swap last year on my friends 96 2.2 (5spd) legacy. He scored a good running phase 2 ej251 from an 01 impreza. This is what I did we used all his stock 2.2 engine wiring harness to the phase 2 2.5 engine. We got everything working good except for the iacv. I just need to custom plumb his old 2.2 iacv (that was bolted into the old manifold) to the phase 2 intake manifold. The phase 2 iacv is actually on the throttle body. Were actually using his old 2.2 ecu also. He daily drives it and only gets the iacv code.

    Phase 1 iacv is on the manifold (3wires) and tps sensor is also 3wires while the phase 2 iacv is on the throttle body (4wires) and the tsp sensor also have 3 wires. Even if you use the ej251 phase 2 engine wiring harness and ecu, the harness that goes to the ecu don't have the extra wires. I would suggest you use your old engine wiring harness. Let me know and I'll explain all the things we had to do to make it work except for the iacv
    The only codes I'm getting at the moment are the IACV codes.

    I put an ECU from a 2001 Forester in today and although the codes are still there the car runs great. I may try swapping just the engine harness before swapping timing bits because I'd really rather not swap cam/crank gears.

    Quote Originally Posted by r3v_v3ng3
    What year car is the engine on again? I'm thinking you have a 2nd gen legacy (if i remember correctly from your avatar)
    The car is a 2000 Impreza OBS and the engine is from a 2001 Forester. Both are phase 2 motors.

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