[Juztin]

Okay, so a little info on this issue. I get my car back from aps tt install and of course promptly putting 1k miles on the setup on some cruises. I noticed some hesitation under WOT on some spots and of course my immediate thought is knock. After some datalogs I of course see some slight knock under boost that needs to be addressed no biggie, but for the hell of it I decided to do some leisurely data logging and noticed a hell of a lot of small knock counts when off boost and the ECU controlling.

For example, this is some leisurely dirving staying below 3k rpms and with maybe 10-20% tps and no positive boost (knock count is last column):

2015 019 -4.7 00 ECU. rich 00001
2046 019 -4.7 00 ECU. rich 00000
2100 018 -4.8 00 ECU. rich 00001
2120 019 -5.0 00 ECU. rich 00001
2128 018 -5.2 00 ECU. rich 00001
2222 018 -5.3 00 ECU. rich 00002
2194 019 -5.4 00 ECU. rich 00001
2244 018 -5.6 00 ECU. rich 00001
2262 018 -5.7 00 ECU. rich 00001
2278 018 -5.8 00 ECU. rich 00001
2318 018 -5.9 00 ECU. rich 00002
2350 018 -6.0 00 ECU. rich 00002
2355 018 -6.1 00 ECU. rich 00002
2387 018 -6.1 00 ECU. rich 00002
2413 017 -6.2 00 ECU. rich 00002
2431 017 -6.2 00 ECU. rich 00005
2454 017 -6.6 00 ECU. rich 00005
2487 017 -6.9 00 ECU. rich 00005
2523 017 -7.0 00 ECU. rich 00004
2525 017 -7.1 00 ECU. rich 00005
2564 017 -7.2 00 ECU. rich 00008
2579 017 -7.1 00 ECU. rich 00003
2608 017 -7.1 00 ECU. rich 00001
2618 017 -7.0 00 ECU. rich 00004
2645 017 -7.1 00 ECU. rich 00002
2645 016 -7.1 00 ECU. rich 00001
2681 016 -7.3 00 ECU. rich 00002
2696 014 -7.7 00 ECU. rich 00003
2716 012 -7.9 00 ECU. rich 00001
2710 012 -8.6 00 ECU. rich 00002
2745 009 -8.9 00 ECU. rich 00002
2736 009 -9.2 00 ECU. rich 00004
2723 004 -9.7 00 ECU. rich 00005
2743 001 -10.1 00 ECU. rich 00004
2705 000 -10.6 00 ECU. rich 00003
2688 000 -10.9 00 ECU. rich 00003
2692 000 -11.0 00 ECU. rich 00003
2730 000 -11.2 00 ECU. rich 00002
2677 000 -11.2 00 ECU. rich 00002
2653 000 -11.2 00 ECU. rich 00001
2647 000 -11.2 00 ECU. rich 00004
2645 000 -11.2 00 ECU. rich 00003
2594 000 -11.2 00 ECU. rich 00005
2608 000 -11.2 00 ECU. rich 00001
2577 000 -11.2 00 ECU. rich 00004
2564 000 -11.0 00 ECU. rich 00006
2552 000 -11.2 00 ECU. rich 00005
2538 000 -11.2 00 ECU. rich 00004
2491 000 -11.2 00 ECU. rich 00006
2480 000 -11.2 00 ECU. rich 00004
2483 002 -11.2 00 ECU. rich 00004
2491 002 -11.2 00 ECU. rich 00006
2450 002 -11.2 00 ECU. rich 00006
2445 002 -11.0 00 ECU. rich 00002

Note my position is '00' so it's running off of ECU and this is of course reflected with the 'ECU' label for timing.

When I depress the clutch:

1622 000 -11.3 00 ECU. rich 00000
1634 000 -11.4 00 ECU. rich 00000
1609 000 -11.4 00 ECU. rich 00000
1559 000 -11.4 00 ECU. rich 00001
1451 000 -11.4 00 ECU. rich 00001
1351 000 -11.4 00 ECU. rich 00000
1238 000 -11.4 00 ECU. rich 00000
1131 000 -11.4 00 ECU. rich 00000
1026 000 -11.3 00 ECU. rich 00000
0934 000 -11.2 00 ECU. rich 00000
0847 000 -11.0 00 ECU. rich 00000
0832 000 -10.9 00 ECU. rich 00000
0822 000 -10.8 00 ECU. rich 00000
0820 000 -10.7 00 ECU. rich 00000
0799 000 -10.6 00 ECU. rich 00000
0777 000 -10.5 00 ECU. rich 00000
0773 000 -10.4 00 ECU. rich 00000
0772 000 -10.4 00 ECU. rich 00000
0772 000 -10.4 00 ECU. rich 00000
0766 000 -10.3 00 ECU. rich 00000
0784 000 -10.3 00 ECU. rich 00000
0795 000 -10.3 00 ECU. rich 00000
0805 000 -10.3 00 ECU. rich 00000
0834 000 -10.3 00 ECU. rich 00000
0847 000 -10.3 00 ECU. rich 00000
0862 000 -10.4 00 ECU. rich 00000
0864 000 -10.4 00 ECU. rich 00000
0891 000 -10.4 00 ECU. rich 00000
0895 000 -10.4 00 ECU. rich 00000
0909 000 -10.4 00 ECU. rich 00000
0909 000 -10.5 00 ECU. rich 00000
0914 000 -10.5 00 ECU. rich 00000
0900 000 -10.6 00 ECU. rich 00000

The knock count completely dissapears (anything < 1K knock stops).

Hmmm... OK.

So I'm thinking is there:

1) Bad Gas?
2.) Some other issue (injector scaling (no option for it in the utec v2.8d(c), mechanical false knock)

I've tried a few different stations (shell, phillips 66, conoco) and still no resolution. So I'm thinking bad gas is possibly out the window.

I do hear some kind of odd almost sounds like air, almost sounds like something mechnical buzzing that is somewhat porportionate to rpm.

What is weird is free revving i'm seeing all this knock, but after 3k rpm it seems to also drop off.

Ok....O_o

So I went ahead and modified the UTEC to kick in control at -11 psi absolute.

I immediately knew it was running in the 10% column as the car started running hella rich and was having trouble even getting to 3k rpms as it was running so bad with the fuel.

I'm STILL seeing knock...... 2x o_O

Here's a capture of that:

0738 006 -9.8 00 ECU. rich 00000
0772 009 -9.6 10 ECU. rich 00000
0902 012 -9.4 10 ECU. rich 00000
0975 012 -8.9 10 ECU. rich 00000
1143 011 -8.5 10 ECU. rich 00000
1307 011 -8.4 10 ECU. rich 00000
1480 011 -8.8 10 ECU. rich 00000
1598 011 -9.2 10 ECU. rich 00000
1755 011 -9.7 10 ECU. rich 00000
1843 011 -9.8 10 +25.4 rich 00000
1876 011 -9.9 10 +16.4 rich 00000
1895 011 -9.9 10 +8.0 rich 00000
1844 012 -9.8 10 +8.0 rich 00000
1809 014 -9.7 10 +8.0 rich 00000
1787 015 -9.2 10 +8.0 rich 00000
1794 015 -8.7 10 +8.0 rich 00000
1848 015 -8.4 10 +8.0 rich 00000
1931 014 -8.1 10 +6.3 rich 00001
1985 014 -8.1 10 -0.5 rich 00001
1972 014 -7.9 10 -0.5 rich 00000
1887 014 -7.6 10 -0.5 rich 00001
1787 014 -7.3 10 -0.5 rich 00001
1675 014 -7.3 10 +20.5 rich 00000
1573 015 -7.3 10 ECU. rich 00000
1728 018 -6.9 10 ECU. rich 00000
2006 018 -6.6 10 +12.7 rich 00000
2229 018 -6.4 10 +1.7 rich 00001
2181 004 -6.2 10 -0.5 rich 00002
2089 000 -7.7 10 -0.5 rich 00000
1973 000 -9.1 10 -0.5 rich 00001
1864 000 -9.8 10 -0.5 rich 00001
1757 000 -10.3 10 -0.5 rich 00000
1658 000 -10.7 10 ECU. rich 00000
1548 000 -11.0 10 ECU. rich 00000
1430 000 -11.3 00 ECU. rich 00000
1315 000 -11.5 00 ECU. rich 00000
1205 000 -11.7 00 ECU. rich 00001
1089 000 -11.7 00 ECU. rich 00001
0993 000 -11.7 00 ECU. rich 00000
0945 000 -11.7 00 ECU. rich 00000
0898 000 -11.7 00 ECU. rich 00000
0873 000 -11.6 00 ECU. rich 00000
0856 000 -11.6 00 ECU. rich 00000
0835 000 -11.4 00 ECU. rich 00000
0832 000 -11.4 00 ECU. rich 00000
0825 000 -11.4 00 ECU. rich 00000
0822 000 -11.3 00 ECU. rich 00000
0803 000 -11.3 00 ECU. rich 00000

So from the above we see that now I'm logging map point '10' for the column I want to be in. So I know the UTEC is in control and yet even with running super rich I'm still getting some knock and of course the utec is retarding. EDIT: But now that I look at it after posting, the knock did seem to drop off quite a bit when the UTEC controls and dumps fuel compared to the ECU controlling.

What is odd with all this is the knock seems to really happen from like 1k to 3k distincitvely. After 3k it really drops off and I dont see much knock after 3k (maybe an event here or there sporadicaly) but no where near the frequency off UTEC control.

If you wondering, no i dont have a WB (yes I know, that will be addressed sooner or later) but right now I'm pretty positive it would be reading rich with the sheer amount of fumes being dumped out the back (i'm also on stock exhaust with stock cats so that gas is going through quite a few filters and yet still makes the environmental air pretty flammable).

One of the most obvious things is am I hearing knock? Kind of a hard quesiton to answer as when free-revving no I dont hear any. But that weird sound I'm hearing (mix between air hissing and buzzing) I can sometimes hear audibly from within the cab driving and I've heard knock before and this doesn't quite sound like it.

So from there, sorry for this extremely long post guys 'n gals but any suggestions on what to look at would be great but one of the reasons for this post was:

What happened to the injector scaling in UTEC v2.8? On mine v2.8d(c) under open loop fueling (or any of the other params) there is no injector scaling options anymore. Instead of the original options you got in 2.3 it just says "for future use" in those two lines where it used to be. I tried searching, but didn't really hit any results on here, and the user guide still has it as options even thought it's no longer there. Their docs need some TLC.

Thanks for any possible insite into wth happened to injector scaling, or any other suggestions.

The unknowns for me currently are:
1.) possible injector crapping out causing one cyl to knock possibly from maybe lean
2.) injector scaling? (what happened, where'd it go with 2.8 or maybe i'm missing some obvious RTFM entry saying what happened to it)
3.) false knock due to some mechanical possiblity
4.) astronomical odds that its bad gas, if it is i'm heading to buy a powerball ticket bitches!
5.) Possible bad ground on the UTEC
6.) God hates me, so I should take a shot and drive into the sunset till it blows