RomRaider Logo

RomRaider

Open Source ECU Tools
 FAQ •  Register •  Login 

RomRaider

Documentation

Community

Developers

It is currently Thu Feb 22, 2018 2:40 am

All times are UTC - 5 hours [ DST ]





Post new topic Reply to topic  [ 60 posts ]  Go to page Previous  1, 2, 3, 4  Next
Author Message
 Post subject: Re: Logging Forester 2.0 Petrol Auto?
PostPosted: Thu Dec 12, 2013 8:15 am 
Offline
Newbie

Joined: Wed Dec 04, 2013 2:59 am
Posts: 27
Just tried another approach to the problem.
Bolted off the knocksensor, taped it to a close hose.
In my mind this should disable fault knock since it´s not connected to the engine.
Huh...I could see in the logger that finelearning knocksensor value was -7 and ignition 7-10 degrees under heavy load.


Top
 Profile  
 
 Post subject: Re: Logging Forester 2.0 Petrol Auto?
PostPosted: Fri Dec 13, 2013 4:52 pm 
Offline
Newbie

Joined: Wed Dec 04, 2013 2:59 am
Posts: 27
This is propably my last post in a while, think I give up on this now.
Sasha_A80 has been very helpful, thank you sir!

I did a quick logging after bolting off the knocksensor and taping to a hose, imagined things would be better if knocksensor was not connected to the engine.

Same old story, just copied from logfile and it is about this, gear 4 and slightly upphill slowly give more throttle to gain speed:

rpm 2130
Fine Learning Knock Correction -7

Ignition Total Timing 10,00
Intake VVT Advance Angle Left 48
Intake VVT Advance Angle Right50
Throttle Opening Angle 47

Edit: Googling "subaru hesitation remap" made find that this is a common problem.
Quote: The remap mentioned in the OP is colloquially known to Subaru UK as a 'hesitation remap' I believe. The factory mapping is rather conservative (they don't want knock-related engine damage during warranty) and so is set for a low knock threshold to take account of running on poor quality fuels that are encountered in many export regions. The result is that cars can feel like they are running with retarded ignition (because they are!) and this can give hesitancy in second and third gear acceleration and rather a 'flat' feel to throttle response.
End of quote

Subaru UK knows about this and offer a remap for unhappy customers.


You do not have the required permissions to view the files attached to this post.


Top
 Profile  
 
 Post subject: Re: Logging Forester 2.0 Petrol Auto?
PostPosted: Sun Dec 22, 2013 4:54 am 
Offline
Newbie

Joined: Sun Dec 15, 2013 4:03 am
Posts: 9
Sasha_A80 wrote:
MY06/MY07 has a secondary air system, MY08\MY09 does not. You have one problem less.


Just curious, how could one detect failing secondary air system? In case it could be my cause of the hesitation problem, wouldn't the fact that hesitation disappears after resetting the ECU for a while exclude it from the possible causes?

At the same time I'd like to ask you guys whether the definition file for my car exists or not (ECU ID : 4554307006, Call ID : Unknown). When I download the ECU defs file and set it using the manager, the next time I start it complains that it's been not set again (?). Any ideas where/what to go/do next?

I reckon my ECU is the 16bit HITACHI units, as everywhere I ask in Sydney they say it's not tune-able.

My car is 2.0R MY06 Subaru Liberty MT EJ204.

Cheers and thanks for all your help.

M


Top
 Profile  
 
 Post subject: Re: Logging Forester 2.0 Petrol Auto?
PostPosted: Mon Dec 23, 2013 2:01 pm 
Offline
Senior Member

Joined: Mon Jan 19, 2009 2:31 pm
Posts: 1397
Location: Moscow, Russia
Secondary air system does not cause a hesitation.
Ignition retard due to false knock is a problem.

MY06 Hitachi ecu is based on M32R 32bit processor.


Top
 Profile  
 
 Post subject: Re: Logging Forester 2.0 Petrol Auto?
PostPosted: Wed Dec 25, 2013 12:49 am 
Offline
Newbie

Joined: Sun Dec 15, 2013 4:03 am
Posts: 9
Sasha_A80 wrote:
Secondary air system does not cause a hesitation.
Ignition retard due to false knock is a problem.

MY06 Hitachi ecu is based on M32R 32bit processor.


Thank you. Attached is the log file from a 2h drive, after ECU reset. Hesitation appeared somewhere in 1:15h to driving, but I cannot read it in terms of whether the values are good or bad, I'm very new to this. If anyone could have a look at this and let me know if there is anything obviously wrong, I'd be thankful.

If anyone is willing to do the remap of the ECU for me, I'm willing to deal. Anything that would resolve the problem once and for all. It generally comes up after a heavier engine load (like now, full car of camping gear, driving uphill and sudden loss of power since then it drives like s*** in 2000-2500 rpm)

Any chance of finding the ECU definition for that ID I've provided?

Kind regards,

Michal


You do not have the required permissions to view the files attached to this post.


Top
 Profile  
 
 Post subject: Re: Logging Forester 2.0 Petrol Auto?
PostPosted: Wed Dec 25, 2013 1:22 am 
Offline
Senior Member

Joined: Mon Jan 19, 2009 2:31 pm
Posts: 1397
Location: Moscow, Russia
Hesitation is usually coming after 100 kkm.
Later 2000-3000 RPM full throttle cause hesitation immediately.

You can't reflash Hitachi ecu yourself since there is no commercially available reflash equipment currently.


Top
 Profile  
 
 Post subject: Re: Logging Forester 2.0 Petrol Auto?
PostPosted: Sat Dec 28, 2013 5:42 am 
Offline
Senior Member

Joined: Mon Jan 19, 2009 2:31 pm
Posts: 1397
Location: Moscow, Russia
Hesitation is a common problem.
Subaru Liberty\Impreza discussion:

http://forums.whirlpool.net.au/archive/1743376


Top
 Profile  
 
 Post subject: Re: Logging Forester 2.0 Petrol Auto?
PostPosted: Sat Dec 28, 2013 7:47 am 
Offline
Newbie

Joined: Sat Dec 28, 2013 7:40 am
Posts: 1
So what do you suggest to do Sasha?
:D


Top
 Profile  
 
 Post subject: Re: Logging Forester 2.0 Petrol Auto?
PostPosted: Sat Dec 28, 2013 8:12 am 
Offline
Newbie

Joined: Wed Dec 04, 2013 2:59 am
Posts: 27
I still havent heard from Subaru Nordic about my problems and it seems they are ignoring me.
Maybe I just do what FHI want´s me to do, buy a new car.
Mazda CX-5 here I come :lol:

Seriously, this problem is getting very annoying and most of all that Subaru Nordic ignores my problems.


Top
 Profile  
 
 Post subject: Re: Logging Forester 2.0 Petrol Auto?
PostPosted: Sat Dec 28, 2013 11:30 pm 
Offline
Newbie

Joined: Sun Dec 15, 2013 4:03 am
Posts: 9
Caper wrote:
Mazda CX-5 here I come :lol:


I'm eyeing the Mazda 6 Wagon! beautiful car! But unfortunately I cannot afford selling and buying a new one.. I love my Liberty!


Top
 Profile  
 
 Post subject: Re: Logging Forester 2.0 Petrol Auto?
PostPosted: Tue Feb 25, 2014 7:10 am 
Offline
Newbie

Joined: Wed Dec 04, 2013 2:59 am
Posts: 27
Months of pounding my head to a wall (Subaru Nordic) made me realize that cant help me and have no interest doing so either.
Sasha....can you help me out here?
PM or directly in this thread if you can help me.


Top
 Profile  
 
 Post subject: Re: Logging Forester 2.0 Petrol Auto?
PostPosted: Fri Jun 19, 2015 7:27 am 
Offline
Newbie

Joined: Fri Jun 19, 2015 6:55 am
Posts: 1
Dear all,

this post is very interesting. A friend of mine has a SUBARU LEGACY 2.0i of 09.2009 (6 speed) with the same symptom. Is the same engine on his car? I suppose his car has already the AN742 update because he told me he was in the official Subaru and they "upgraded" the ECU.

@Sasha: adding the capacitor would help in this case?

Thank you in advance for your answer.


Top
 Profile  
 
 Post subject: Re: Logging Forester 2.0 Petrol Auto?
PostPosted: Fri Jun 19, 2015 9:22 am 
Offline
Senior Member

Joined: Mon Jan 19, 2009 2:31 pm
Posts: 1397
Location: Moscow, Russia
A capacitor in parallel to the knock sensor just postpones coming hesitation for about 6-12 months.
AN472 reflash does the same.
Those means are not cumulative. Unfortunately...

The problem is that FHI wishes badly you buy new cars.


Top
 Profile  
 
 Post subject: Re: Logging Forester 2.0 Petrol Auto?
PostPosted: Sat Dec 19, 2015 5:54 pm 
Offline
Newbie

Joined: Fri Dec 18, 2015 7:01 pm
Posts: 2
Location: Sofia, Bulgaria
@Sasha, in Australian Libery forum they said in the lasts posts that hesitation issue is fixed by replacement of oil control valves of AVCS. Do you think it can be that failing oil valve is causing abnormal rattle of AVCS or just a coincidence...?


Top
 Profile  
 
 Post subject: Re: Logging Forester 2.0 Petrol Auto?
PostPosted: Wed Dec 30, 2015 1:53 pm 
Offline
Newbie

Joined: Fri Dec 18, 2015 7:01 pm
Posts: 2
Location: Sofia, Bulgaria
I've done some logging with RomRaider, so here is what I notice, the car is Impreza 2.0R. Yesterday all looks ok with Learned ignition timing not less than -3. Today I feel slight hesitation on uphill around 2300-2800 rpm, not so bad, you can barely feel it if using throttle carefully. However I had with me the laptop so immediately start logging.

Here is what is visible at the beginning, uphil throttle on 40% and then suddenly advance is corrected with -8.5 dropping total advance which I can feel as hesitation. No change is throttle and load:

Attachment:
2015-12-30_19-19-41.png


Then a bit after it full throttle and -8.5 correction, timing goes to 10 and some hesitation (not so bad):

Attachment:
2015-12-30_19-29-34.png


Sometimes I see in the log advance correction to -8.5 immediately after release of full throttle:

Attachment:
2015-12-30_19-31-33.png


Also here:
Attachment:
2015-12-30_19-34-42.png


But sometimes I see even positive correction under high load and full throttle (maybe ECU re-learns?):
Attachment:
2015-12-30_19-36-07.png


Here also:
Attachment:
2015-12-30_19-38-35.png


Some scatters, where is visible that the extreme negative corrections around -8.5 are mostly between 2490 and 3000 and load between 0.8 and 1:
Attachment:
2015-12-30_19-40-07.png


And here is the other table which shows that. Unfortunately with that ECU, I cannot read the learning table from memory and only such indirect analysis can be done:
Attachment:
2015-12-30_19-44-38.png


I am attaching also the log. @Sasha what do you think, is that cam rattles?
In the moment I don't feel it too bad, 2 weeks ago it was much worse for 2 days before I even knew there is such issue. At least from the logs I see that the cams are moving together so there are no issues with OCV valves. The car is running generally fine in the moment and if I don't push it too hard in these revs cannot feel any hesitation...


You do not have the required permissions to view the files attached to this post.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 60 posts ]  Go to page Previous  1, 2, 3, 4  Next

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Style based on FI Subsilver by phpBBservice.nl