My build specs are listed at bottom incase they are needed. After a long ordeal I've got a functioning Wideband setup. The factory didn't use PE for the truck (it comes on at 90% TPS). I went ahead and copied PE settings from my 1999 C5 Corvette, and bumped up the EQ Ratio table to be doubly safe. I've gotten most of my runs within 5% (on rich side) of commanded AFR.
What I'm struggling with is knock. A friend said, these trucks have VERY sensitive knock sensor settings. I've very nervous to dial them back and honestly I don't even know how.
Is there a good tutorial on "knock sensitivity"?
I wonder if it actually is false knock as I decided to turn PE on at 30% throttle across the board. I'd originally turned it on at 64%. I beat the crap out of the truck and couldn't' get it to register any knock. That's "12 false knock test..." in folder below.
I raised the AFR slightly and saw a slight bit of knock in "13 increase AFR to 12 under 4800 RPM"
Note when I switched up PE the fueling was all off again, on rich side but was just a quick test so hope to dial back PE / TPS threshold.
I also noticed comparing my spark tables from my Corvette to my truck, there's very little advance in the truck tune. Is it possible to still get knock with such little advance?
My tune and log files are loading to folder linked below:
https://drive.google.com/drive/folde...usp=drive_link
MY BUILD
2001 Z71 Tahoe
P59 PCM with factory truck tune baseline
Stock intake
Custom Cam DUR @ 0.050" 210* / 222 * Lift 0.553 / 0.561 LSA115* 4A
Dual valve springs (matched to cam, forget specs)
1.6:1 Yella Terra ultralight shaft mount full roller rockers
Johnson 2116 LSR lifters w/ Manton pushrods (forget series but thicker walls)
LQ9 Crankcase w/ floating wrist pins
Balanced rotating assembly & matched piston & connecting rod weight w/in 1g
Pure Power 460A alternator w/ big three upgrade to cabling
Factory LQ9 heads 317 castings (polished combustion chambers & Exhaust ports)
Built 4L60E & NP 246 TX case specs too long to list
I think that's about it
My NOTES:
Burst Knock: Burst Knock
Diagnosing Knock https://www.youtube.com/watch?v=cXf3fnrZGwU