2019 SS Knock issues

2019 2SS false knock.... I have been dealing with false knock from stock to after my flex fuel and tune and am about to install two new knock sensors but wanted to see who else has had this issue. Currently seeing about 1 degree WOT no matter timing or lambda and have desensitized with little help. I?m running e77 and working with Kyle from goat rope garage to troubleshoot. Hoping my sensors are crap and after replacing them it will help but looking for feedback from others about this and what they have done to stop it.

Currently have rotofab cai,katech porter tb, awe track axle back and flex fuel kit.

Attachment 94210

attached a log showing the continued 1 degree knock

Log your low side fuel pressure, if it's falling off that maybe your issue, does it do it on regular gasoline?

Attachment 94213

I only run e now but prior I briefly logged and dynoed without e85 or any tune and still showed knock

You have a blip of knock on that log, the first log shows almost 0 knock retard but a constant amount of "total knock" I've seen cases where the car is not reaching its desired fuel pressure and the injector pulse width is to high and it will do that. Log the fuel pressure on the low side, and fuel pump duty cycle. You can also have the car target a leaner A/f .88-.90 which will help.

What injector pulse with should I be conferenced with and where is fuel pressure low side? I have all channels for fuel open and don?t see anything with low available?

another log

5MS, Low side fuel pressure is your normal fuel pressure from the pump, should be around 70psi or so. You are already logging your rail pressure.

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Originally Posted by ZincGT

5MS, Low side fuel pressure is your normal fuel pressure from the pump, should be around 70psi or so. You are already logging your rail pressure.

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I think I just found what you are talking about.

if my fuel pressure requested is higher than what is being supplied would that cause car to pull timing?

Also, why are there times when it shows 0 fuel pressure!?

I had a coil take a slow shit that caused months of painful searching.

Static knock table solved my problems! Zero them out and poof no more false knock retard!

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Originally Posted by floridanick

Static knock table solved my problems! Zero them out and poof no more false knock retard!

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Interesting that it shows up under that umbrella..

I zeroed out the table as well and it also got rid of some false knock I was chasing.