Weird Acceleration

Posts specific to the 2.0 litre NA engine

Re: Weird Acceleration

Postby hans » Thu Jan 07, 2010 1:32 am

My LIB MY07 having the same problem. Which petrol is better. BP or Mobil??
hans
 
Posts: 4
Joined: Thu Jan 07, 2010 12:05 am
Car: Liberty MY07
Real name: Hans

Re: Weird Acceleration

Postby adz2.0r » Fri Jan 08, 2010 9:11 pm

I would recomend mobile
adz2.0r
 
Posts: 149
Joined: Mon Jun 08, 2009 1:34 pm
Location: sydney
Car: my06 2.0r

Re: Weird Acceleration

Postby mihai » Mon Jan 11, 2010 9:17 pm

im using Mobil at the moment.

If it really continues to bug you, then take it to Subaru for an ECU reset. Mine started doing it on mobil too after months of use and it pissed me off. So Subaru did an ECU reset and its been running fine on any fuel since then. However i continue to use Mobil
[New: MY11 FPV F6 | Winter White | Pioneer DEX-P99RS | Alpine PDX-F6 | Alpine PDX-M12 | JL Audio 12W7-AE ]
[Old: MY07 2.0R | Urban Grey | 5 MT | 6000k HID | LED | Alpine IVA-W502E | Alpine PDX1.1000 | Alpine PDX4.150 | JL Audio 12W7v3 | Focal KRX2 ]
User avatar
mihai
 
Posts: 1640
Joined: Mon Jun 01, 2009 10:27 pm
Location: Melbourne, VIC
Car: MY07 Liberty 2.0R + MY11 FPV F6
Real name: Michael

Re: Weird Acceleration

Postby deeps » Thu Feb 25, 2010 4:59 pm

Noticed this in my MY07 2.0R as well

Wasn't there when i test drove it. I think they used normal fuel instead of 95RON when they filled half the tank up before handing over the car

I have poured octane booster, and it hasn't made a difference, I will reset the ECU now and see if that fixs the problem.
deeps
 
Posts: 86
Joined: Fri Jul 17, 2009 12:35 am
Location: Perth
Car: Subaru Liberty MY07 2.0R

Re: Weird Acceleration

Postby deeps » Thu Feb 25, 2010 11:19 pm

Didn't make a difference at the beginning, but coming towards the end of a fairly long drive, it MAY have gone away. I'm not 100% sure yet, but it seemed to be alot smoother accelerating

Have you guys tried upper cylinder cleaner to rectify the problem?

Also, was the air conditioner on by any chance?
deeps
 
Posts: 86
Joined: Fri Jul 17, 2009 12:35 am
Location: Perth
Car: Subaru Liberty MY07 2.0R

Re: Weird Acceleration

Postby mihai » Fri Feb 26, 2010 1:26 am

air con was definately off everytime.

what ive found is that using different fuels does make it better/worse. At the moment i dont have it at all, but it has a tendency of popping up whenever it wants and then refusing to replicate itself when it goes to Subaru.

So far ive used 4 different fuels,
1 - Shell VPower (was going fine, then started doing it and was ongoing until i switched to BP Ultimate)
2 - BP Ultimate (worked fine, did it occasionally, petrol station was a bit out of my way)
3 - Mobil 8000 (so far probably the best that I've used. Occasionally does it, however much less often than the Shell VPower)
4 - Caltex Vortex (only filled up once with it, seemed fine)

Ive also tried the 100 octane stuff from the Liberty petrol station on Princes Hwy in Mulgrave, was quite dissapointed, my car felt less powerful.

i was on my way to Subaru to pick something up and it started doing it really bad, so one of the mechanics went for a drive with me and he saw and felt what it was doing. He did an ECU reset and it solved it. Hasnt happened since. Still dont know the cause of the issue but would most definately like to know. Next service I will be getting them to check it thoroughly.
[New: MY11 FPV F6 | Winter White | Pioneer DEX-P99RS | Alpine PDX-F6 | Alpine PDX-M12 | JL Audio 12W7-AE ]
[Old: MY07 2.0R | Urban Grey | 5 MT | 6000k HID | LED | Alpine IVA-W502E | Alpine PDX1.1000 | Alpine PDX4.150 | JL Audio 12W7v3 | Focal KRX2 ]
User avatar
mihai
 
Posts: 1640
Joined: Mon Jun 01, 2009 10:27 pm
Location: Melbourne, VIC
Car: MY07 Liberty 2.0R + MY11 FPV F6
Real name: Michael

Re: Weird Acceleration

Postby deeps » Fri Feb 26, 2010 5:54 pm

After driving more today, i can confirm the problem is now gone :)
deeps
 
Posts: 86
Joined: Fri Jul 17, 2009 12:35 am
Location: Perth
Car: Subaru Liberty MY07 2.0R

Re: Weird Acceleration

Postby adz2.0r » Fri Feb 26, 2010 10:34 pm

How do you reset the ECU? can I do it at home?

Cheers Adam
adz2.0r
 
Posts: 149
Joined: Mon Jun 08, 2009 1:34 pm
Location: sydney
Car: my06 2.0r

Re: Weird Acceleration

Postby deeps » Fri Feb 26, 2010 11:47 pm

Remove negative terminal on battery
Press down brake pedal for 10 seconds

wait a minute or two

put back negative terminal on battery

if your radio has lost it's presets, it's been reset
deeps
 
Posts: 86
Joined: Fri Jul 17, 2009 12:35 am
Location: Perth
Car: Subaru Liberty MY07 2.0R

Re: Weird Acceleration

Postby mihai » Sat Feb 27, 2010 12:28 am

deeps wrote:Remove negative terminal on battery
Press down brake pedal for 10 seconds

wait a minute or two

put back negative terminal on battery

if your radio has lost it's presets, it's been reset


im not sure about the radio presets.

when Subaru reset my ECU, my presets remained fine, also when i did disconnect my battery my presets also remained although my 'dial sweep' came back! The previous owner disabled it i think.
[New: MY11 FPV F6 | Winter White | Pioneer DEX-P99RS | Alpine PDX-F6 | Alpine PDX-M12 | JL Audio 12W7-AE ]
[Old: MY07 2.0R | Urban Grey | 5 MT | 6000k HID | LED | Alpine IVA-W502E | Alpine PDX1.1000 | Alpine PDX4.150 | JL Audio 12W7v3 | Focal KRX2 ]
User avatar
mihai
 
Posts: 1640
Joined: Mon Jun 01, 2009 10:27 pm
Location: Melbourne, VIC
Car: MY07 Liberty 2.0R + MY11 FPV F6
Real name: Michael

Re: Weird Acceleration

Postby deeps » Sat Feb 27, 2010 3:43 am

There's a fuse that can be removed, that will retain the presets and everything else, but clear the ECU.

I'm not sure which fuse it is, I didn't bother looking for it, battery is just alot easier
deeps
 
Posts: 86
Joined: Fri Jul 17, 2009 12:35 am
Location: Perth
Car: Subaru Liberty MY07 2.0R

Re: Weird Acceleration

Postby adz2.0r » Thu Mar 04, 2010 4:58 pm

thanks Deeps
adz2.0r
 
Posts: 149
Joined: Mon Jun 08, 2009 1:34 pm
Location: sydney
Car: my06 2.0r

Re: Weird Acceleration

Postby chances » Sun Mar 28, 2010 2:46 pm

Hey I just registered an account to say thank you for this thread!! :)

Had my Liberty MY06 for about 3 weeks, after a few days it felt kinda doey so I filled it with 98 fuel and it was sweet!

Then yesterday I was pulling up to a roundabout, stabbed the gas and it sputtered and coughed real bad WTF ?!?!

Then after reading this thread I reset the ECU, when I 1st turned the key it wouldnt start but then the 2nd time it started straight up :assassin:
Warmed it up and then took it for a thrash and it felt smooth all the way up the rev range :D

So yeah! :) thanks again, I thought I was going to have to take it in and spend $100's to get it checked out.
chances
 
Posts: 1
Joined: Sun Mar 28, 2010 2:40 pm
Car: Liberty MY06 2.0

Re: Weird Acceleration

Postby dmh87 » Sat Jun 26, 2010 3:00 am

Hey, just another thankful liberty owner.
I also have this same problem where there is lack of acceleration between 2500rpm and 3500rpm, I had a few mechanics say it was my clutch, but wasn't too sure.
After reading this post, I tried the ECU reset for myself and problem gone =)

Although, the problem has come back every now and then, and I find myself having to reset the ECU each time, and each time the problem goes away.
Does anyone know if this is bad for the ECU in anyway or did anyone ever find out where the problem originated from?

Either ways, thanks again!
dmh87
-stickered-
 
Posts: 252
Joined: Fri Jun 25, 2010 7:40 am
Location: Melbourne/Sydney
Real name: huy

Re: Weird Acceleration

Postby deeps » Sun Jun 27, 2010 8:17 pm

Problem originates from bad fuel.

Could be from carbon buildup (try Upper engine cleaner), or even a dirty fuel filter etc, bad spark plugs etc. But the general consensus is that it happens from using bad fuel.

You can reset the ecu as many times as you like, no problems whatsoever.
deeps
 
Posts: 86
Joined: Fri Jul 17, 2009 12:35 am
Location: Perth
Car: Subaru Liberty MY07 2.0R

PreviousNext

Return to 2.0R engine specific

Who is online

Users browsing this forum: No registered users and 1 guest

cron