Hello,
I'm having engine knock issues w/ my ZL1 that shows up in my data log ...need some thoughts on this issue and possible causes on what needs to be looked at for re tuning.
Here are my list of current mods
2013 zl1 6.2L LsA
-2.55 upper pulley
-ID 850 injectors upgrade
-Kooks LT headers 2" pipes to 3" collector w/ no cats offroad pipes
-Dual fan heat exchanger
-CAI (Rotofab)
-Dyno Tuned
Thanks
Last edited by Agent M ZL1; 12-09-2015 at 09:03 PM.
Post the tune.
You'll get more help that way.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
Agree.. post tune
Knock looks like it happens several times in short order which makes me think it might be real.
LOL of course!!!
tune attached
Is wideband working in the log? Doesn't look like it.
nope i don't have wide band
just want some thoughts on the fix i'm only doing 11.26s .. and some friends are telling me that I should be running in the high 10s w/ the mods i have on..that my tune needs to be dialed in
You aren't going to dial in much of anything without a wideband
Agreed, a wideband is a must.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
But do you see anything that is obvious in the tune that could be wrong causing engine knockOriginally Posted by 5FDP
what fuel are you using e85 or regular 93? i would wideband it 1st see how its running
Josh Performance Tuning (956)784-0059
https://www.facebook.com/joshperformancetuning
On pump gas 93 octane ... what do i need to wide band data log it. I have MPVI Pro
A wideband sensor/controller.
This is what I'm using currently:
http://www.plxdevices.com/Wideband-O...7346002719.htm
Post a log and tune if you want help
VCM Suite V3+ GETTING STARTED THREADS / HOW TO's
Tuner by night
CPX Tuning
2005 Corvette, M6
ECS 1500 Supercharger
AlkyControl Meth, Monster LT1-S Twin, NT05R's
ID1000's, 220/240, .598/.598, 118 from Cam Motion
2007 Escalade, A6
Stock
you need a wideband, as your 02's are dropping to ~850mv in a few areas which is usually a sign it's running lean... and since you don't have a Wideband it prob was never tuned right to start. Dyno tuned doesn't mean it is right. Until you do that I would pull at least 5deg timing from WOT area's until you get a wideband installed...
2010 Camaro LS3 (E38 ECU - Spark only). MS3X running complete RTT fuel control (wideband).
Whipple 2.9L, 3.875" Pulley, kit injectors, supplied MSD Boost-A-Pump, stock pump
LG Motorsports 1 7/8" Headers - No Cats, stock mid pipe with JBA Axle Back
ZL1 Wheels/Tires
Tune is garbage. All the ID850 data is wrong or missing. PE table is jacked up. MAF table is jacked up. In the log it appears the O2's stay pegged rich all the time and the fuel trims aren't correcting it. And the timing in the log is all over place at WOT.
Bryan
O2's are cycling actually.. though in a weird fashion. They're staying on the rich end a lot longer than the lean side.
Burst KR is still enabled. I'm a bit curious on why timing is going negative while gear # is staying the same
Wow. Fuel trims seem to be pretty out of wack.
Im betting that is Burst Knock and it prolly needs to be reduced a tad.
Im also wondering why the timing looks so low and all over the place at WOT.
Last edited by Tripwire; 12-11-2015 at 06:22 AM.
Where in the VCM editor do i navigate to see the fuel injector data , PE table, Maf Table ?
Fuel injector data. Engine-->fuel-->general--> "injector control" section
PE table. Engine-->fuel-->Power Enrich-->Eq ratio (gas)
MAF table. Engine-->airflow-->general-->Airflow vs. Freq low & high
I wouldn't even start the engine without the proper injector data. Why is the PE table set up like that ? Trying to fudge the values to correct for afr/maf error? Instead of calibrating the maf? Thats what it looks like someone did.
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