surging through the rev range particularly cold

[suff]

Add me to the list.. having the same damn issue.. hesitant to go back to Subaru given the car is no longer under warranty.. see no point in paying them to guess what the issue is!

[05gtwagonman]

Yup Suff,
And they keep trying to tell me that the majority of what I call "the issue" is perfectly normal.. The 2l is apparently highly strung. I wonder how ecu remapping gets an appriciable increase in output if this is so. Grab a honda vtech and try and get 20-40kw more out of it! I have not tried, but I am told that this is imposible from ecu alone. But honda's don't seem to surge (ok it's not a turbo... But!).

A couple of the boys on here have alluded to the idea that a remap makes our cars even smoother, but I want to know that mine is running right before I go there. I will keep you posted in the hope that it might kill some of the search time for you if we get a result. Let's see what the new ECU brings shortly, I don't think that they have it yet...

[Spec B Wgn]

Yup Suff,
And they keep trying to tell me that the majority of what I call "the issue" is perfectly normal.. The 2l is apparently highly strung. I wonder how ecu remapping gets an appriciable increase in output if this is so. Grab a honda vtech and try and get 20-40kw more out of it! I have not tried, but I am told that this is imposible from ecu alone. But honda's don't seem to surge (ok it's not a turbo... But!).

A couple of the boys on here have alluded to the idea that a remap makes our cars even smoother, but I want to know that mine is running right before I go there. I will keep you posted in the hope that it might kill some of the search time for you if we get a result. Let's see what the new ECU brings shortly, I don't think that they have it yet...

its very easy to achieve an increase of approx 20 kws with a remap.

firstly the OEM ECU runs conservative boost, conservative ignition timing and lots of fuel (in cases 9.1 air to fuel ratio) to give peace of mind to Subaru Australia.

A bit more boost, iron out the horrible fuel ratio, add some timing and you have a totally different car still operating within the factory set limits. and better fuel economy.

i noticed throttle response greatly improved after my ECU mods. The car responds more actively...

[BlackGT]

Yup Suff,
And they keep trying to tell me that the majority of what I call "the issue" is perfectly normal. ...

A couple of the boys on here have alluded to the idea that a remap makes our cars even smoother, but I want to know that mine is running right before I go there. ...

I'm sooo in the same boat

[suff]

I can understand how a re-map will fix the issue.. and with a turbo 20kw+ is very possible, in a small displacement NA though.. no chance in hell!

My issue is why are there so many people having this issue.. what sort of K's do you guys have on the clock.. mine just rolled over 93k.. seems subaru's have a lot of issues as they get close to the 100k mark.. quite disappointing!

[05gtwagonman]

92k.... But this has been getting progressively worse from about 65.
Also since we are bitching, what's with the half second or so dely between putting your foot on the accel and getting a reaction From the throttle? Subaru says that it is simply the way an electronic or 'fly by wire' throttle works but i have driven several other makes of car with FBW with no discernable problem, and when I drove the new forrester the other day it didn't seem to either. The update of my ecu 9 months ago seemed to help but it's still very much there?????? With all the other problems (minor but annoying) I dare not ask to revisit this one...

[Spec B Wgn]

92k.... But this has been getting progressively worse from about 65.
Also since we are bitching, what's with the half second or so dely between putting your foot on the accel and getting a reaction From the throttle? Subaru says that it is simply the way an electronic or 'fly by wire' throttle works but i have driven several other makes of car with FBW with no discernable problem, and when I drove the new forrester the other day it didn't seem to either. The update of my ecu 9 months ago seemed to help but it's still very much there?????? With all the other problems (minor but annoying) I dare not ask to revisit this one...

i know throttle response is improved dramatically with a decent ECU flash / tune.

[adam]

Also since we are bitching, what's with the half second or so dely between putting your foot on the accel and getting a reaction From the throttle?

my 2.0L throttle response is razor sharp but my GT suffers from this issue.

[suff]

Spec B Wagon - you might be able to offer some advice on this..

Is there any reason why you couldnt get a ECU tuned for a car.. and then copy it amongst other cars (providing they are identical cars with identical levels of modification)

Other than manufacturing tolerance's I cant see any reason why this wouldnt work (of course, this wouldnt work for different transmissions)

My thoughts are:

this seems to be effecting MY05's.. we should get one ecu tuned (if we are all running 5spd manual) or two if there is some auto's floating around.. we should also order a bulk qty of o2 sensors (one each) and replace all of our sensors, hopefully resulting in a substantial discount.. the new sensor combined with a new ECU tune should (hopefully) result in an alleviation of the surging issue + the added bonus of a significnat power increase for around $500 (cost of o2 sensor + a % of the cost of the ECU tune?)

Thoughts?

[05gtwagonman]

How do you get the 'tune' to the car?

[Arith]

How do you get the 'tune' to the car?

I've got a 2GB USB stick you can borrow if that helps.

[suff]

Thanks Arith so helpful

When I say "tune" I mean a reflash of the ECU base maps.. exactly the same as MRT offer.. essentially 1 person gets their car "tuned" and we roll out that map across multiple ECU's (not MRT's tune though, due to copyright issues)

[Spec B Wgn]

Spec B Wagon - you might be able to offer some advice on this..

Is there any reason why you couldnt get a ECU tuned for a car.. and then copy it amongst other cars (providing they are identical cars with identical levels of modification)

Other than manufacturing tolerance's I cant see any reason why this wouldnt work (of course, this wouldnt work for different transmissions)

My thoughts are:

this seems to be effecting MY05's.. we should get one ecu tuned (if we are all running 5spd manual) or two if there is some auto's floating around.. we should also order a bulk qty of o2 sensors (one each) and replace all of our sensors, hopefully resulting in a substantial discount.. the new sensor combined with a new ECU tune should (hopefully) result in an alleviation of the surging issue + the added bonus of a significnat power increase for around $500 (cost of o2 sensor + a % of the cost of the ECU tune?)

Thoughts?

Ecutek -- is a program that unleashes or unlocks the OEM ECU .

OEM ECU's harbor all the information to make a car run conservatively and hopefully without dramas. Manufacturers hate it when ECU access is obtained.

Ecutek have made a number of generic maps to suit different subarus depending on model and modifications.. These are down loadable by Ecutek sellers. Ecutek charge there distributors a fee for them to have a program to access your ECU.. This fee is charged by Ecutek every single time the distributor accesses and uses the new software on a new car with their program. The fee isnt charged again when further enhancements or tuning is done . Its a once off fee and a fair proportion of the upfront cost.

if the distributor wants to do another new car for example then he has to pay the up front costs again to Ecutek for the unlock codes.

These codes arent passed on or reuseable on another car, unless another fee is charged by ecutek. So whilst the map or reflash can be used again & again & again the unlock code issued by Ecutek to gain the access cant.

Ecutek spent thousands on encryption to prevent this.

[suff]

thats why I specifically said NOT ECUTek

Is there any reason why an image generated in OpenECU (or alike) could not be cloned?

[05gtwagonman]

Just to be picky, and to clarify, suff, you didn't specify openecu, you did discount ecutec by proxy by saying that MRT and therefore ecutec had copyright issues...

Spec B: Are you affiliated with, in any way any tuning house or specifically MRT. I ask this for two reasons- You are very knowledable on this issue, and you are also very quick to take what could be thought to be the role of someone looking to protect the status quo in the tuning business...
Now b4 you or anyone else take offense, I have no problem with anything that you have written, I just like to know where all of us are coming from... You have been very helpful and I, in no way want you to take offense to this question... I also note that you have not posted anything that may alert the inquisitive such as myself, as to who you are, or what you do or who you know, in so far as a quick search of your posts might reveal... Just asking.

All that said, arith- you crack me up, but your usb stick clearly has no port to jam itself into at this time.... Can you guys please enlighten the f#&king ignorant here...

Suff: I think that your suggestion is really great, but regardless of where spec b is coming from, I would think that (if I know anything) we are talking a reflash of the actual chip in the ECU and the risk of this stuffing up, and the fact that you could so easily end up with a very expensive 5 seater lounge in the garage would tell me that this is one area that paying a pro is definately worth the money...

If there are newcomers, here's a question- Are there others who can back the earlier assertion that a re-tune can fix these types of issues at the same time? Subaru are still on this issue for me- not bad in that they agree that it is a pre-existing issue despite it has now fallen out of warranty...

Can I also add, that despite all this- every time I look at, or drive this car it still sends my heart racing and cracks me a big smile. The worst GT is still ahead of the best Commode, I know first hand.