Learning View Snapshots \ Discussions

[alexeiwoody]

Ohh I see. That's sitting right around the limit. Must get great fuel economy

[paggaz]

Last week there was some FLKC in the higher 2.70+ load ranges between 3600-5200rpm but seems to have dropped to the lower revs.

This is my latest LV taken last night.

[paggaz]

Turned out I had a dodgy batch of fuel from BP in Fyshwick which was setting the knock sensor off. A few people have experienced it. Emptied that tank, filled up with Caltex and looks like she's running all sweet again

[alexeiwoody]

Did you reset the ecu? And who's the tuner?

[paggaz]

Did you reset the ecu? And who's the tuner?

Yep, I reset the ECU. The learning view was taken after a day or so of driving after the ECU was reset. It's tuned by Matt (kido)

[alexeiwoody]

Kewl, I'm pretty sure we've covered it in the start of this thread, a couple of days won't be enough to start seeing the 'full picture' with an LV, get a week or more of driving done to get a proper sample size.

Your maf scaling looks a little off, and it most likely wasn't a bad batch of fuel.

Anyway the knock you had in there in the first place is pretty minor, drive the car hard and see what comes up. Do a few serious pulls

[paggaz]

Kewl, I'm pretty sure we've covered it in the start of this thread, a couple of days won't be enough to start seeing the 'full picture' with an LV, get a week or more of driving done to get a proper sample size.

Your maf scaling looks a little off, and it most likely wasn't a bad batch of fuel.

Anyway the knock you had in there in the first place is pretty minor, drive the car hard and see what comes up. Do a few serious pulls

My bad...I haven't had the chance to read this entire thread...Anyway, will do!
When I said a day of driving, it was being driven hard that day for the purposes of checking if it was still knocking. I'd say about 60 kms highway driving, 50 kms hard town driving. I'll continue doing so and see how it goes after a week or so

[bigBADbenny]

And do a wot pull or three before taking the LV, once its re-learnt, which is at least after 30min of mixed off boost driving, leading into on-boost driving.

[bass_straitener]

My bad...I haven't had the chance to read this entire thread...Anyway, will do!
When I said a day of driving, it was being driven hard that day for the purposes of checking if it was still knocking. I'd say about 60 kms highway driving, 50 kms hard town driving. I'll continue doing so and see how it goes after a week or so

Neither of your LVs are anything to worried about. You'd know from driving if your car doesn't feel quite right.

Your AF learnings are well within acceptable percentages and the first range is at idle so not really that important as its more an indicator for a vac leak if the number exceeds 15%.

Enjoy the car and check once a fortnight or so, if you start getting paranoid.

And drive as you would normally. No need for pulls etc.

Compensations and corrections will always be made for various conditions from fuel quality to air density to a dirty air filter. That's what the ECU is supposed to do. If your IAM drops however I'd be a little concerned then and start looking deeper.

[dr20t]

My bad...I haven't had the chance to read this entire thread...Anyway, will do!
When I said a day of driving, it was being driven hard that day for the purposes of checking if it was still knocking. I'd say about 60 kms highway driving, 50 kms hard town driving. I'll continue doing so and see how it goes after a week or so

Neither of your LVs are anything to worried about. You'd know from driving if your car doesn't feel quite right.

Your AF learnings are well within acceptable percentages and the first range is at idle so not really that important as its more an indicator for a vac leak if the number exceeds 15%.

Enjoy the car and check once a fortnight or so, if you start getting paranoid.

And drive as you would normally. No need for pulls etc.

Compensations and corrections will always be made for various conditions from fuel quality to air density to a dirty air filter. That's what the ECU is supposed to do. If your IAM drops however I'd be a little concerned then and start looking deeper.

Amen

[alexeiwoody]

Haha yeah that works too, nothing majorly wrong anywhere, initial LV could just be the common knock sensor noise. I've had worse noise than that.

If you want a perfect tune, get it dynoed. Would it be worth it? Probably not.

End of the day - you've probably got more important things to do than worry whether your tune is 95% or 100% good

[KiDo_Tuning]

Kewl, I'm pretty sure we've covered it in the start of this thread, a couple of days won't be enough to start seeing the 'full picture' with an LV, get a week or more of driving done to get a proper sample size.

Your maf scaling looks a little off, and it most likely wasn't a bad batch of fuel.

Anyway the knock you had in there in the first place is pretty minor, drive the car hard and see what comes up. Do a few serious pulls

5 canberra guys all had a seriously bad batch of fuel... 5 messages/emails all within 4 or 5 days. That is when you suspect something with fuel as these particular cars have always been knock free. When it pulls timing at high rpm and timing is smooth, then you start to suspect

Fuel quality will affect CL fuel trims as well as ambient temperature

[alexeiwoody]

Sorry matt, I'm definitely not having a go at your tuning because of a relatively clean LV

Just saying this
- wouldn't a bad batch of fuel be more noticeable across the load ranges? As it's a bad batch of fuel and should be a constant factor across the board. Also saying this from a small amount of personal experience - bad fuel I've seen makes itself known by getting your IAM involved, as it's across the board, constantly bad, not just sometimes
- his fuel trims at idle, even after filling up new fuel and reseting are about the same? That's kinda weird if the fuel was different before, right?

It looks pretty clean either way, is that even real knock since it's so small? Who knows?!

One thing Paggaz, if you get knock again don't reset your ecu. If there is knock - those LV tables mean your ecu has pulled timing to compensate and protect your engine. If the knock was noise or not there anymore, the ecu will return the timing to normal, on its own

If the knock event was due to engine detonation, the ecu has compensated for it - and you went and reset that compensation. Now the engine has to knock again before the ecu can pull timing and make it safe again.

Edit: not that 1.4 in flkc is a dangerous amount of knock, but you get the idea

[KiDo_Tuning]

Sorry matt, I'm definitely not having a go at your tuning because of a relatively clean LV

Just saying this
- wouldn't a bad batch of fuel be more noticeable across the load ranges? As it's a bad batch of fuel and should be a constant factor across the board. Also saying this from a small amount of personal experience - bad fuel I've seen makes itself known by getting your IAM involved, as it's across the board, constantly bad, not just sometimes
- his fuel trims at idle, even after filling up new fuel and reseting are about the same? That's kinda weird if the fuel was different before, right?

It looks pretty clean either way, is that even real knock since it's so small? Who knows?!

One thing Paggaz, if you get knock again don't reset your ecu. If there is knock - those LV tables mean your ecu has pulled timing to compensate and protect your engine. If the knock was noise or not there anymore, the ecu will return the timing to normal, on its own

If the knock event was due to engine detonation, the ecu has compensated for it - and you went and reset that compensation. Now the engine has to knock again before the ecu can pull timing and make it safe again.

Edit: not that 1.4 in flkc is a dangerous amount of knock, but you get the idea

No offence taken, just pointing out that LV is a tuning tool I had a 05 XT Foz that was clean until it hit peak torque on the bad fuel.

I also had my wifes car knocking on E85(WTF!) with some -1.51's but it turns out the fuel filter needed replacing as fuel flow was intermittently cutting out on boost and you could feel it spluttering...

[paggaz]

Thanks for the advice, gents, and the helpful interpretations of the LV.

The Taxtrix is one of my new toys so I've been playing around with it, and this was the only time my LV was giving me a bit of FLKC so I thought I'd post it up. I knew the knock was small, but just didn't know if it was detrimental or anything.

Anyway, all that has been discussed has been taken on board. Cheers