Data logged last night...... uhm??

fasterthanurwrx · **Joined:** Mon Sep 18, 2006 2:55 pm **Posts:** 229

Hey guys...

Well I updated the drivers for my cable and now I can data log!

Here's the question...

When I look at Knock correction.. I understand why it goes negative.. But why is it going possitive??? It went UPTO 12.

It did it on and off Boost.. Is this normal? Or should I be freaking out (Cause I'm kinda freaking out)

Thanks..

Jeramie · **Posted:** Wed Oct 11, 2006 9:48 pm

KC should move based on eingine load and rpm. Take a look at your KC table and it should make a little more sense.

swifty · **Posted:** Thu Oct 12, 2006 12:03 pm

yes, this is normal.

negative kc is indicative of a problem, namely detonation

fasterthanurwrx · **Joined:** Mon Sep 18, 2006 2:55 pm **Posts:** 229

oh!! Good.

Menoche · **Joined:** Sun Aug 27, 2006 7:30 pm **Posts:** 11

Knock correction is the way the ECU optimizes timing.

if the ECU doesn't detect knocking, it will increase timing up to the timing correction map maximum.

if the ECU detects lots of timing at base value of initial timing map it will retard up to the maximum retard defined in your tables. That's where you see negative values and it means trouble :-(

either check your gas or reduce timing for this slot.

Phil

hammerhead · **Joined:** Sat Sep 02, 2006 9:07 am **Posts:** 176

Hi - sometimes I get one instance of a negative KC value between gear changes or after lifting of the gas suddenly (throttle angle =0). It never appears under load - is this normal? Thanks.

mattims · **Posted:** Mon Oct 16, 2006 11:29 am

i dont know about normal, but it does seem to happen quite a bit. I dont fully understand it because if the load is zero it should be outside the knock learning range.. either way i dont think it matters.

Menoche · **Joined:** Sun Aug 27, 2006 7:30 pm **Posts:** 11

do you, by any chance, have a blow off valve 100% atmo?

Jeramie · **Posted:** Mon Oct 16, 2006 12:57 pm

hammerhead wrote:

Hi - sometimes I get one instance of a negative KC value between gear changes or after lifting of the gas suddenly (throttle angle =0). It never appears under load - is this normal? Thanks.

I c this as well. I've pretty much been told by multipul people, if you see -KC under vacume it is most likley just engine noise. :?:

hammerhead · **Joined:** Sat Sep 02, 2006 9:07 am **Posts:** 176

thanks guys

fasterthanurwrx · **Joined:** Mon Sep 18, 2006 2:55 pm **Posts:** 229

Yes,

All this info has helped me out, Thank You.

I do have another question.

For some reason, I am no longer able to data log!!

I don't get a error when I connect to the ecu.

Any thoughts?

Jeramie · **Posted:** Mon Oct 16, 2006 7:08 pm

need more info. Is the defrost button still checked in lowere menu? Is it still set to activate logging when defrost acticvated?

fasterthanurwrx · **Joined:** Mon Sep 18, 2006 2:55 pm **Posts:** 229

I don't know.

I will plug my notebook in and check it out sometime tuesday

RomRaider

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