Subaru idle fix – idle relearn

Subaru idle fix – idle relearn

This should work on Subaru with an electronic throttle body. Please let us know how it worked for you. https://twitter.com/McCauleysAuto

The Subaru in this video is a 2009 Subaru Forester. 1) Turn off the lights, aircon, stereo or any system in the car that draws extra current on top of the engine.
2) Disconnect the battery for 30 mins.
3) Reconnect the battery.
4) Before you start the car for the first time, turn the key to the ON position but do NOT turn the engine over. Wait 10-15 seconds so the electronic throttle body or IACV has time to go to the factory programmed home position.
5) After waiting, start the car and let it idle without any load, lights, A/C etc.
6) Every 20 seconds or so the idle will be adjusted up and down as the ECU tries to adjust it towards a stoichiometric fuel / air mix.
7) Leave the engine running for a full 10 mins but DO NOT TOUCH THE ACCELERATOR during this time or turn on anything that will cause extra electrical current draw.
😎 Turn off the engine, and leave the key in the OFF position for at least 20 sec.
9) As per step (4) turn the key back to the ON position for 10-15 sec without actually starting the engine.
10) Start the engine and leave to idle for a further 5 minutes without touching the accelerator and without turning on other systems in the car.
11) Turn off the engine again and wait at least 20 sec before restarting.
12) Take the car for a test drive as the ECU should now be fully retrained.

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Comments

Sajad Salim says:

Hey i just tried it no luck but my engine management lights atill on. Just got a question with the steps for leaving it off do you completely take the key out for the off as my immobiliser kept kicking into place??? Does that make a difference to the setup???

Mike Ferguson says:

I can't believe this worked!  Been rough idling for quite a while now – assumed it was dirty throttle body, injectors, failed coil etc.   Hopefully it's not just masking a bigger issue for a short while.  Thanks so much for posting this!

Patrick Boulay says:

I worked for me!! I've only driven for 30 minutes and no problem. See what tomorrow brings. My mechanic was baffled. I'll share the instructions with him.

Robert Pendleton says:

does anyone have a rough idle problem on a 2016 legacy 2.5 engine?

Robert Pendleton says:

will this work on a 2016 legacy 2.5 engine?

ak99515ak says:

After sears disconnected the battery my legacy gt. check engine is on and cruise light flashing. Also I have to start the car twice it won't turn on the first time. Idles rough. And almost stalls when I step on the gas. I try this method but still have the same problem

Falah Aldulimi says:

Did the exact steps and still sitting below 500 rpms

B8SoGr8Its9/8 PlsDontH8orBeIr8 says:

it would be nice if I could hear the fucking car you retarded piece of dog shit.

Tom says:

You don't disconnect the positive terminal first

Sean Robinson says:

This video just saved me a lot of time and stress. Thank you!

Render Last Name says:

Beside for the life threatening music video RULES

Olivier Legault says:

Should you do the idle relearn on an engine thats allready hot or a cold engine ?

Chad Rushing says:

After removing the battery for headlight replacement my 2010 started stalling on idle. This fixed it. If you have idle cutouts it may also be your crankshaft position sensor which is an easy self did also. The position sensor is tough for dealerships to identify because the error code is misidentifying it as alternator.

John-Daniel Martin says:

Does it have to be the positive terminal you take off

Gros Robot says:

Work fine with my Subaru Forester 2007 ! Even the check engine light stop and the cruise worked again … thanks dude.

phil Maltese says:

I was experiencing a rough idle when I would come to a stop or if I was in park and turned my air conditioning off, yes that's right, off.. my oil temp light, AWD, and sport mode light would flicker while it happened. I was getting pretty worried, it's an 08 Impreza 2.5i automatic. I cleaned my throttle body, and then tried this and it's back to normal. Thank you so much for this video McCauley'S auto!

ewex2216 says:

Thank you so much! You saved me a trip to the dealership! Car idles great now.
Ps. The song sucks.

Rene Barker says:

After much frustration during attempts to idle engine and at traffic lights, this procedure appears to have worked on my 2006 Subaru Forester. Much Appreciated!

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