Learning View Snapshots \ Discussions

[alexeiwoody]

Thanks Matt, so this is normal then? The LV looks healthy or need a tweak?

Thanks Ben for the link on the light load knock correction. This one is quite an interesting article.

Taken from the following link: http://www.evoxforums.com/forums/archiv ... 16998.html

'..As a result, light load "knock correction" is not something to worry about. This is a normal process that is even more apparent when utilizing stock calibrations designed to utilize a range of fuel quality.. '

It's not "normal", but very unlikely to cause major damage, since it's at low load.

Needs to be taken in context with - how often, how much and how concentrated is the timing pull? Always in the same area and a few degrees at a time - likely there's something causing it. Whether it's actual cylinder knock - need knock ears...

Even libs on E85 sometimes get this kind of reading from the knock sensor, and it certainly isn't cylinder knock in those cases (otherwise there'd be a few less soobies on the road).

If it's random timing pulled at rare occasions and logs clean 99% of the time otherwise - just keep an eye on it.

[oldmate]

This my most recent LV after the Lib getting dyno tuned (around 500kms since). The tuned commented that he doesnt even look through LV tables when he tunes. There seems to be a lot of red figures, not 100% up to speed on this all but it doesnt look ideal to me. Weather has been rather cold since tune, any opinions on what I can suggest to the tuner when I go back for a paid update.
ps I'm not a heavy footed driver
Cheers

[KiDo_Tuning]

This my most recent LV after the Lib getting dyno tuned (around 500kms since). The tuned commented that he doesnt even look through LV tables when he tunes. There seems to be a lot of red figures, not 100% up to speed on this all but it doesnt look ideal to me. Weather has been rather cold since tune, any opinions on what I can suggest to the tuner when I go back for a paid update.
ps I'm not a heavy footed driver
Cheers

I assume he has never done one of these before? Looks like he has a straight line boost table but fuel trims are causing issues and its pinging somewhere above 14psi.

[jslayz]

I've just done 500kms this week, heres mine:



Tune is for EBCS but only running WG.

[THE SpecB]

[quote="oldmate"]This my most recent LV after the Lib getting dyno tuned (around 500kms since). The tuned commented that he doesnt even look through LV tables when he tunes. There seems to be a lot of red figures, not 100% up to speed on this all but it doesnt look ideal to me. Weather has been rather cold since tune, any opinions on what I can suggest to the tuner when I go back for a paid update.
ps I'm not a heavy footed driver
Cheers

[/quote

Who is the tuner ?? Strange comment to make

[oldmate]

This my most recent LV after the Lib getting dyno tuned (around 500kms since). The tuned commented that he doesnt even look through LV tables when he tunes. There seems to be a lot of red figures, not 100% up to speed on this all but it doesnt look ideal to me. Weather has been rather cold since tune, any opinions on what I can suggest to the tuner when I go back for a paid update.
ps I'm not a heavy footed driver
Cheers

[/quote

Who is the tuner ?? Strange comment to make

Forced performamce. He's a local guy that specialises in fords but has done a fair few wrx/foresters. He has a 4wd dyno and uses on the fly logging to tune.

[alexeiwoody]

This my most recent LV after the Lib getting dyno tuned (around 500kms since). The tuned commented that he doesnt even look through LV tables when he tunes. There seems to be a lot of red figures, not 100% up to speed on this all but it doesnt look ideal to me. Weather has been rather cold since tune, any opinions on what I can suggest to the tuner when I go back for a paid update.
ps I'm not a heavy footed driver
Cheers

[/quote

Who is the tuner ?? Strange comment to make

Forced performamce. He's a local guy that specialises in fords but has done a fair few wrx/foresters. He has a 4wd dyno and uses on the fly logging to tune.

It's a good thing you're not a heavy footed driver. Those fuel trims are a very poor effort. Don't pay to get that fixed, that should have been done the first time - or an explanation given as to why your car can't be tuned to have proper fuel trims like a normally functioning car. As an example - maybe you have a leak somewhere and he didn't notice and tuned around it. In that case the tuner can say, "yeah actually, I did have to scale the MAF quite a lot more than normal for a stock intake...let's look for a leak".

Also looks like he's not the greatest with Subaru ECU logic, AND you've got timing being pulled in your higher end engine load. If that's real cylinder knock, then you better put it on the dyno and find out for sure.

I'd suggest asking for a refund and going to a proven Subaru tuner like coyote, matt spry - up your way...only because I know what it's like chasing up a tuner and getting crap results over and over. Knowing what I know now - if he couldn't get it right the first time and there's nothing wrong with the car - I'd run! Cheapest option might not be the cheapest option and all that.

[KiDo_Tuning]

Forced performamce. He's a local guy that specialises in fords but has done a fair few wrx/foresters. He has a 4wd dyno and uses on the fly logging to tune.

It's a good thing you're not a heavy footed driver. Those fuel trims are a very poor effort. Don't pay to get that fixed, that should have been done the first time - or an explanation given as to why your car can't be tuned to have proper fuel trims like a normally functioning car. As an example - maybe you have a leak somewhere and he didn't notice and tuned around it. In that case the tuner can say, "yeah actually, I did have to scale the MAF quite a lot more than normal for a stock intake...let's look for a leak".

Also looks like he's not the greatest with Subaru ECU logic, AND you've got timing being pulled in your higher end engine load. If that's real cylinder knock, then you better put it on the dyno and find out for sure.

I'd suggest asking for a refund and going to a proven Subaru tuner like coyote, matt spry - up your way...only because I know what it's like chasing up a tuner and getting crap results over and over. Knowing what I know now - if he couldn't get it right the first time and there's nothing wrong with the car - I'd run! Cheapest option might not be the cheapest option and all that.

Probably not helping that he started with a US e-tune first. Stock tune is better from all the ones I have seen attempted on these engines.

It could also be that the engine has since developed a boost leak, the closed loop is noting the excess fuel due to the leaking air and the fuel trims end up negative as the ECU pulls out fuel to compensate... would explain the economy too.

[oldmate]

I had put the stock rom back in before i took it to him to be tuned. They whole time on the dyno he never mentioned once that anything mechanical could cause these problems. Plan is to finish off this tank then put stock back in and see if it the tune causing these problems and hopefully not leaks anywhere. He did come highly recommended and i did pay full price ($750) even though he had to use my laptop and tactrix as his was failing. Cheers all

[alexeiwoody]

Forced performamce. He's a local guy that specialises in fords but has done a fair few wrx/foresters. He has a 4wd dyno and uses on the fly logging to tune.

It's a good thing you're not a heavy footed driver. Those fuel trims are a very poor effort. Don't pay to get that fixed, that should have been done the first time - or an explanation given as to why your car can't be tuned to have proper fuel trims like a normally functioning car. As an example - maybe you have a leak somewhere and he didn't notice and tuned around it. In that case the tuner can say, "yeah actually, I did have to scale the MAF quite a lot more than normal for a stock intake...let's look for a leak".

Also looks like he's not the greatest with Subaru ECU logic, AND you've got timing being pulled in your higher end engine load. If that's real cylinder knock, then you better put it on the dyno and find out for sure.

I'd suggest asking for a refund and going to a proven Subaru tuner like coyote, matt spry - up your way...only because I know what it's like chasing up a tuner and getting crap results over and over. Knowing what I know now - if he couldn't get it right the first time and there's nothing wrong with the car - I'd run! Cheapest option might not be the cheapest option and all that.

Agreed, could've developed afterwards, but in that case I'd expect the idle trims to be out too...

Yep oldmate, flashing to stock should help diagnose

Probably not helping that he started with a US e-tune first. Stock tune is better from all the ones I have seen attempted on these engines.

It could also be that the engine has since developed a boost leak, the closed loop is noting the excess fuel due to the leaking air and the fuel trims end up negative as the ECU pulls out fuel to compensate... would explain the economy too.

[oldmate]

So I put the stock tune back in for approx 100kms to see if the airflow range values were very different so I know what I need to talk to the tuner about, and if he cant tune it possible reimbursement. This is the LV from the stock tune, still not looking ideal. Any suggestions on what to look for on the car, checked lines for signs for a boost leak but couldnt find anything that stood out. After this time pretty sure I am going a different approach with tuners
Cheers

[jslayz]

Haha, stock tune not knocking!
Run the stock one, get you $ back from local shop. clearly not experienced enough.

[shav]

Have a few LV's done yesterday out of interest thanks to Hotwire. Can anyone detect any issues based on these please?

[THE SpecB]

No Knock Shav

Good !

[shav]

No Knock Shav

Good !

Excellent. That's a plus. Thanks