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Old 11-21-2020, 11:20 PM   #1
rocketsled
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Default Frustrated...Any thoughts before I tear it apart?

Hello!
I've swapped an ej20x into my '05 Outback XT. It does hard start and run very roughly but seems I am having a no fire issue on bank 1 (passenger side). Neither cylinder 1 or 3 seem to be firing at the right time.
I determined this by unplugging the 1 and 3 coil packs while running and noticed no change. I ruled out the packs themselves by replacing with known good ones. Also used inline test light and observed spark on both cylinders.
I think I am getting proper fuel as well because there is a lot of backfiring going on when running until I unplug the injectors for 1 and 3.
Also I have swapped out cam sensors, crank sensor, tried running with bank 1 cam sensor unplugged, avcs unplugged, maf unplugged, and map unplugged with no change.

FYI, I am running this setup with exhaust AVCS unplugged. Before putting the engine in I did change the timing belt, pulleys, and plugs. I was very careful lining up all marks on the belt, cam gears, crank gear, and timing covers but did not purge the new tensioner. I just learned about purging air from the tensioner from a video I just watched. Perhaps the belt jumped a tooth on startup? I did double check that the crank pulley is not missing any signal teeth/bent teeth.

I am not getting any CEL for misfire so this seems to be more evidence of it being a mechanical timing issue. I can't think of anything else to try before pulling the engine back out and inspecting the head/valves. Does anyone have any idea what might be going on here? Could a problem with the Intake AVCS cause this?

Thanks in advance!
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Old 11-21-2020, 11:48 PM   #2
snow_bound26
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Are you using JDM cams and sensors or USDM cams and sensors? Are you using a USDM or JDM ECU? There are differences between them including sensor position.
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Old 11-22-2020, 04:14 AM   #3
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Seems simple, but I've reversed the injector plugs during swaps, might wanna double check it. Also you should be able to check/confirm your timing without pulling the motor.
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Old 11-22-2020, 09:23 PM   #4
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Quote:
Originally Posted by snow_bound26 View Post
Are you using JDM cams and sensors or USDM cams and sensors? Are you using a USDM or JDM ECU? There are differences between them including sensor position.
Original USDM ECU
JDM Cams (Dual AVCS but I've read numerous accounts of these working with exhaust avcs unplugged)
JDM Cam Sensors (Same part # and location)
JDM Crank Sensor (no numbers but looks identical and in same position on top of oil pump)
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Old 11-22-2020, 09:31 PM   #5
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Quote:
Originally Posted by SoCoNoHa View Post
Seems simple, but I've reversed the injector plugs during swaps, might wanna double check it. Also you should be able to check/confirm your timing without pulling the motor.
Rear Injector Plug will not reach the front injector with the way the harness lays in factory position.
Plan on pulling timing covers tomorrow and check cam marks.
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Old 11-23-2020, 10:43 PM   #6
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So I got the covers off today and this is what I found. Starting with Crank and Going clockwise...
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Old 11-23-2020, 10:45 PM   #7
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Old 11-23-2020, 10:47 PM   #8
kharmicresonance
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That model year outback XT has an ECU for a 2.5l engine. Did you swap it for a different make/model year 2.0l ECU? Besides this the harness pinouts are different as well iirc.
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Old 11-23-2020, 10:51 PM   #9
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Old 11-23-2020, 11:00 PM   #10
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Old 11-23-2020, 11:01 PM   #11
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[IMG]20201123_162307 by NWA Electric, on Flickr[/IMG]
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Old 11-23-2020, 11:03 PM   #12
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[IMG]20201123_162452 by NWA Electric, on Flickr[/IMG]
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Old 11-23-2020, 11:04 PM   #13
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Old 11-23-2020, 11:05 PM   #14
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[IMG]20201123_162750 by NWA Electric, on Flickr[/IMG]
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Old 11-23-2020, 11:07 PM   #15
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[IMG]20201123_162648 by NWA Electric, on Flickr[/IMG]
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Old 11-23-2020, 11:36 PM   #16
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Could not get a good pic of the passenger side exhaust cam rear cover mark because I am unable to remove the the front cover completely and it obstructs my camera. Mark looks good though when I check with a mirror.
I have to admit that the Drivers side intake cam looks as if it could go forward a half tooth but that's not possible...right?
Seems like all the other marks are right on. Was really hoping that there would be something way off on the Passenger side as that is the one not firing correctly.
Going to swap the crank sensor from wifes forester first but I'm afraid I've got a doa engine and removing the head is my next step forward...):
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Old 11-23-2020, 11:36 PM   #17
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Quote:
Originally Posted by snow_bound26 View Post
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Sorry, should work now!
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Old 11-23-2020, 11:41 PM   #18
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Quote:
Originally Posted by kharmicresonance View Post
That model year outback XT has an ECU for a 2.5l engine. Did you swap it for a different make/model year 2.0l ECU? Besides this the harness pinouts are different as well iirc.
Original USDM ECU should work from what I've read...
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Old 11-23-2020, 11:53 PM   #19
rocketsled
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I suppose before doing anything too rash I should log some run time with my recently acquired laptop and tactrix cable. New to me but I think I should be able to see the individual cams and crank triggering right?
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Old 11-24-2020, 09:15 PM   #20
rocketsled
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Problem Solved!!!!

Although I was certain the wires feeding the coils were correct I double checked everything and decided to swap them while running to see what would happen...vrrrooom!!!

When I received the engine, the coil wires had been yanked off and the black was broken so I replaced it with a white one that I had. Must have gotten them reversed on reassembly. Feel like such an ass for spending so much time trying everything else first but super glad I figured it out before tearing the head off.

Now I can move forward with tuning! Thanks for those who helped!
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