Engine hesitation/flat spot (Liberty 2.0R)

Posts specific to the 2.0 litre NA engine

Re: Engine hesitation/flat spot (Liberty 2.0R)

Postby Alpejohn » Fri Oct 10, 2014 4:50 pm

Hello guys!

Feel like i know alot of you alredy as i have read the whole thread. :P

Anyways, my girlfriends 07 Legacy 2.0R auto (or liberty to you if i understood correctly? :) ) just got
the flatspot issue a few days ago. It has ca 130 000 km on the clock.
Had a big service late october last year (not sure how much they change in the biggest service).

When it reaches 2500 rpm, the rpm needle starts jumping a bit up and down, before it downshifts a few times.
When it finally passes 3500 rpm it feels normal again. If i drive the car in manual mode, so the rpm is between 2500 and 3500,
give full throttle, nothing happends. Cant hear any popping og anything when this happends.
She has a leak in joint at one muffler so its not so easy to hear at the moment.

Talked to a Subaru dealer yesterday, and they had one car with similar problems, they changed the MAF and it was fine.

Try to read fault codes with a autel device, but it returned 0. (but as i read here, this might not show everything?).


I havent started to investigate yet, and im not looking forward to it as i never toutched a boxer engine before,
so im not sure whats up and down here if you know what i mean. :mrgreen:
Will try to clean the EGR, MAF and check fault codes. The dealer could log everything they told me, so will do that to
when im going in there.
Also we will try with 98 octane fuel as she now uses (and has always) 95. Just to see what happends..


Hope the problem is a easy fix, and not like osme of you that just cant get rid of it.. :?

Regards
Fredrik from Norway
(Sorry for my not so perfect english.. :lol: )
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Re: Engine hesitation/flat spot (Liberty 2.0R)

Postby Kormoran » Sat Oct 11, 2014 2:23 am

Hey all!

Um... shamefully it turns out I had a few loose spark plugs... installed 40,000km ago... Thanks Ultratune for the great work :roll: ill never make that mistake again. Not only were they causing the horrible tapping noise but quite possibly my hesitation issues as I made it up a really steep hill in 4th gear at 40km without realising :)
I guess Ill know in a month or so :mrgreen: Big thanks to John French Motors, they know their shit!
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Re: Engine hesitation/flat spot (Liberty 2.0R)

Postby Alpejohn » Sat Oct 11, 2014 4:01 am

I will also check the sparkplugs just in case.

Anybody know if they chagen them on the service around 120 000 km?
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Re: Engine hesitation/flat spot (Liberty 2.0R)

Postby Kormoran » Sat Oct 11, 2014 12:12 pm

Due for a change at 112,500.
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Re: Engine hesitation/flat spot (Liberty 2.0R)

Postby Alpejohn » Sat Oct 11, 2014 8:00 pm

Okay, so they should have been changed then. :)
But beed to check them anyway.

Thanks! :)
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Re: Engine hesitation/flat spot (Liberty 2.0R)

Postby Deep Heat » Sat Oct 11, 2014 10:52 pm

Fix that exhaust leak.
Jack_Keaka wrote: I like my women like subarus, box explodes and does a head easily.
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Re: Engine hesitation/flat spot (Liberty 2.0R)

Postby Alpejohn » Sun Oct 12, 2014 5:37 am

Will do.

Problem wasnt there today, car is running fine. :) :?
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Re: Engine hesitation/flat spot (Liberty 2.0R)

Postby NS_SHERLOCK » Thu Oct 16, 2014 5:16 pm

klam wrote: I've replaced the ECU with the benched-flashed one by the guy in Russia (you'd have to ask him what were the mods, but from what I know he basically deleted (on circuit) the EGR valve and secondary air valves and corrected the map against the knock).


Can you explain where you got this ECU from?? Thanks
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Re: Engine hesitation/flat spot (Liberty 2.0R)

Postby klam » Sun Oct 19, 2014 9:34 pm

NS_SHERLOCK wrote:Can you explain where you got this ECU from?? Thanks


I've bought the second hand one from some Newcastle business for 260 with the key immo chip and BIU included. I've only used the ECU which I've sent to him, he did his job and sent it back. I've done some logging, he adjusted the map and sent me the update which I had to copy over the ECU. Finally he sent me another image with the IMMO files enabled, which I haven't copied yet as I'm yet to organize someone to code my current key to that ECU's IMMO files. (which is obviously different to what is on my key's chip). SO currently I'm driving around with my IMMO disabled ooops...

If you are really that desperate as I was, you can send your own ECU (and not able to drive for around a month) that just send it to him and do the business. That guy was really patient with me and so far I didn't have any issues since.

I've also bought a pair of new OCV's which I haven't installed yet, but plan to use them with my old ECU to see if it helps with the problem or not, as few people here reported some success. It it won't I'll have some OCV's to sell so if anyone would be interested I'm open for a deal.
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Re: Engine hesitation/flat spot (Liberty 2.0R)

Postby PJLIBERTY » Wed Nov 12, 2014 9:14 am

Thanks for the info Snappy.

My 2006 LIberty 2.0R has suffered from this problem too and I have taken it to a Subaru dealer (who sprayed upper cleaner and reset the ECU) then NRMA (who sprayed upper cleaner and reset the ECU) and MRT for the last service but have had no luck so far. The time I took it to MRT it was actually running perfectly on the day I dropped it off, so they didn't get a chance to experience the intermittent problem.

I have booked into McGraths Subaru and I have my fingers crossed. The guy I spoke to on the phone sounded helpful and confirmed they will data log it then send off the Subaru to see what the deal is.
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Re: Engine hesitation/flat spot (Liberty 2.0R)

Postby newbie888 » Thu Nov 13, 2014 11:10 pm

Image

Can someone tell me where my MAF/MAP is? I want to clean it up.
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Re: Engine hesitation/flat spot (Liberty 2.0R)

Postby Deep Heat » Fri Nov 14, 2014 12:43 am

That little sensor with wires coming off it on the left side of black box behind the throttle body.
Jack_Keaka wrote: I like my women like subarus, box explodes and does a head easily.
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Re: Engine hesitation/flat spot (Liberty 2.0R)

Postby newbie888 » Fri Nov 14, 2014 12:54 am

Deep Heat wrote:That little sensor with wires coming off it on the left side of black box behind the throttle body.



This helps me a lot bro. Much appreciate.
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Re: Engine hesitation/flat spot (Liberty 2.0R)

Postby NS_SHERLOCK » Mon Dec 22, 2014 3:33 pm

Hey all.

I want an actual fix, something that will be permanent.

I was thinking an aftermarket ECU.

Any thoughts?
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Re: Engine hesitation/flat spot (Liberty 2.0R)

Postby Kormoran » Mon Dec 22, 2014 8:28 pm

NS_SHERLOCK wrote:Hey all.

I want an actual fix, something that will be permanent.

I was thinking an aftermarket ECU.

Any thoughts?


A new car?
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