Jump to content

Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse

- - - - -

Continuing idle issues with 1995 EJ22 engine (1997 Legacy GT)

  • Please log in to reply
5 replies to this topic

#1 Stevo F

Stevo F

    USMB is life!

  • Members
  • 218 posts
  • Virginia

Posted 16 December 2017 - 01:16 AM

I'm still chasing around the idle idle issues on the '95 EJ22 that is sitting in my '97 LGT. 
Ran fine previously, installed a '95 air tube (for improved airflow over the '97 resonator) and noticed the weird noise coming from the air tube along with slightly erratic idle. I figured I messed up a vacuum line connection somewhere, so I double checked the connections on my '98 wagon (where I also installed a '95 air tube) and everything was connected tight and correctly. I also replaced the original air tube and it still had the same symptoms).
I then pulled a P0505 code and the engine ran rough, like the ECU put it in limp mode. Cleared it and didn't come back for a while.
I also installed new spark plugs (gapped around .43), new NGK wires and did the MSD coil mod, but no change. I also replaced the PCV valve.
Now it's getting P0505 most anytime the car is started. The idle actually doesn't get any rough but a lot more erratic. I'll clear the code and it will smooth out somewhat, but idle still fluctuates, especially when in park.
Does this sound like I just need to remove and clean the IACV? Maybe an electrical problem? I've also checked for any loose or broken vacuum lines and replaced a couple of dried out lines.
I hate to take it to the mechanic, but can't really drive it when it's acting like this, so I'd love to fix it myself.
I did another video of the noise it's making plus the erratic idle for your listening pleasure : https://youtu.be/Py0d3sIQdZY

#2 Bushwick


    1000+ Super USER!

  • Members
  • 1,372 posts
  • Ohio Akronish

Posted 20 December 2017 - 05:08 AM



That code points at the IAC. You can remove it, and see if it's dirty, clogged, gunked up. Can also double-check the connector is tight. With engine running, try wiggling it's connector, as well as the harness for it. If engine straightens out, find the loose connector or possibly wire break, including chaffed wiring. Could have a gasket leak at the sensor, bolts are loose for it, etc. 


If you replace, be sure to get a new gasket for it.

Edited by Bushwick, 20 December 2017 - 05:11 AM.

#3 mikec03


    USMB is life!

  • Members
  • 540 posts
  • greenfield, wi

Posted 21 December 2017 - 10:46 AM

I think that you are very fortunate to get a code.  You should pursue the actions recommended by Bushwick.  I've never had a fluctuating idle with any of my 2.2's so I can't really help.  However on my 2002 2.5, I've had it, and it is very very difficult to correct without a code.  In that case, I eliminated 95% of it by replacing the knock sensor with new OEM.

#4 Boxer Medic

Boxer Medic


  • Members
  • PipPip
  • 14 posts
  • Show low, AZ

Posted 13 January 2018 - 05:54 PM

I know this thread is a few weeks old and since I'm not sure if it has been resolved I thought this video might help.

Similar symptoms, different vehicle but it may help.


#5 Stevo F

Stevo F

    USMB is life!

  • Members
  • 218 posts
  • Virginia

Posted 13 January 2018 - 09:35 PM

Yes, It was totally a bad IACV. I put a used replacement on and everything returned to normal. The idle seems a little rougher in gear, but nothing terrible and idle speeds are normal with no fluctuation. The noise in the intake is gone as well.

#6 idosubaru


    Elite Master of the Subaru

  • Members
  • 23,877 posts
  • East Coast

Posted 14 January 2018 - 05:31 AM

Great. Thanks for following up.

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users