Tuning General Discussion [split]

[Hotwire]

did you read this after you did a reset ?? if so it might well be learning.

Well I read the ROM on Sunday, and the car has been driven maybe a couple of hours since. These were the first decent WOT runs though the rev range I had done though.

Will log it again on the way to work tomorrow and check what Learning View & RR logs look like once I get to work... otherwise off to S&J for some diagnosis I thnk

[parso_rex]

I'd still give the heatshields on the turbo and the exhaust the once over and then change the fuel, reset and try again

[Hotwire]

Thanks Mark - will definatley check out heatshields out.
I just filled the tank today, so will have to wait till next week to try a different fuel unfortunately

[Hotwire]

Well this morning I reset the ECU and did a couple of gentle (1/2-2/3 throttle) runs into higher RPM and the IAM went straight to one. I then did about 6 WOT runs through 1st 2nd on the way to work and this is the result:

LearningView_SS_5-08-2009 7 52 30 AM.jpg (81.52 KiB) Viewed 3891 times

So dont know what was going on yesterday?! The only thing I can think is when its at full load up a hill is when it experienced the knock. So will log again on the way home (up the hills) and see what I get.

[parso_rex]

Thats how it should be even the trims are close. You might find it takes a week or so before you've seen the full effect from differing loads load, outside air temps and stuff, anything that can make it shift form the norm.

[Boxer]

Well this morning I reset the ECU and did a couple of gentle (1/2-2/3 throttle) runs into higher RPM and the IAM went straight to one. I then did about 6 WOT runs through 1st 2nd on the way to work and this is the result:

LearningView_SS_5-08-2009 7 52 30 AM.jpg

So dont know what was going on yesterday?! The only thing I can think is when its at full load up a hill is when it experienced the knock. So will log again on the way home (up the hills) and see what I get.

Are you still feeling that hesitation under load uphills you felt previously?

[Hotwire]

Well this morning I reset the ECU and did a couple of gentle (1/2-2/3 throttle) runs into higher RPM and the IAM went straight to one. I then did about 6 WOT runs through 1st 2nd on the way to work and this is the result:

LearningView_SS_5-08-2009 7 52 30 AM.jpg

So dont know what was going on yesterday?! The only thing I can think is when its at full load up a hill is when it experienced the knock. So will log again on the way home (up the hills) and see what I get.

Are you still feeling that hesitation under load uphills you felt previously?

Yep sure am. Spoke to Sean from S&J Automotive here in Adelaide about it today - he suggested it could be a couple of things - either injectors are flowing uneven amounts of fuel (out of balance) or the AVCS is not resulting in the same cam timing on each side. This can be caused by the oil galleries to the cams becoming clogged over time. He said I should log it and see what timing is resulting with the AVCS on each side and see if its that.

So i ran the log this afternoon and the result seems that there is some variance, however mostly by only 1 degree. There is the odd sample that is out by 3-4 degrees on the Exhaust side however, so will be taking the logs to Sean to see what he says.
Mark - would like to know your opinion on this?

Also, no knock and still IAM of 1.000 when I got home this evening too.

[Boxer]

Interesting, is it really obvious or just slightly noticeable in taller gears? Just one hesitation in a certain rev range or is it constantly hesitating all the way through the rev range?

[Hotwire]

Interesting, is it really obvious or just slightly noticeable in taller gears? Just one hesitation in a certain rev range or is it constantly hesitating all the way through the rev range?

Only in the mid rev range (3500-5500) and only under heavy loads, i.e. up hill in 3rd. WOT run on the flat I can't feel it in 2nd, haven't had a chance to get away from town to do WOT runs on the flat in 3rd.

and on this note, I think I might ask Ric to split this thread from about page 2 into a new topic called "Tuning General Discussion" as we are off on a complete tangent to the 08 Spec B base run now

[parso_rex]

I didn't know you had a hesitation issue maybe I missed it. Theres a weird one that some older subies get on the transition from closed to open loop sort 2~3K rpm with a bit of load usually. Or is it something like the later models get oh saw your new post above
For AVCS 1 degree is nothing thats fine I had 19 at one stage with my STY's 2nd $2K tune and the Autronic . I still see a couple of degrees at times it can be due to a lot of things...the belt can stretch ever so slightly on a fast throttle transition and then the two wheels are a fraction out before the ECU looks at both CAM angle sensors determines the error from its map and then sends the correct pulse width to the AVCS solenoid to adjust it to the correct value and so on. In short 1 degree wouldn't make jack difference

[parso_rex]

and on this note, I think I might ask Ric to split this thread from about page 2 into a new topic called "Tuning General Discussion" as we are off on a complete tangent to the 08 Spec B base run now

LOL doesn't matter to me

[Hotwire]

In looking at the logs, it is often only 1 degree or the same between left and right, but as there is only 1 sample (.3 of a second) at a variance of 3 or 4 degrees, i'm thinking its just a logging error similar.
Unfortunatley I dont know how i'd determine if its the injectors short of pulling them from the car and having flow tested on a bench

Sean said he had seen both problems a couple of times both in and out of warranty periods, so it has happend to a number of EJ20s

[Hotwire]

OK I dont know what the hell is going on! Checked the IAM this avo when I got home from work and its 0.325

Don't know what the feck is going on, as when I log knock sensor 1 and 2 they are showing all 0s?

How would I be pulling so much timing with 0 knock?

[parso_rex]

you don't get any error codes ??and Learning view shows nothing anymore and no DTC's ??

Maybe its not a bad idea to at least let S&J diagnose it They have lots of experience way more than here on a forum LOL

[Hotwire]

Here is the Log under the worst/heaviest load and also the screendump.
Im really confused!