Commanded throttle not following pedal position, also KR

[eclipse5302]

2008 TBSS / LS2, largely stock, twin turbo, E85. I'm still working on the tune - I've got the VE and MAF pretty close (for street tuning), but occasionally this will occur. Step it down, and it will "flutter" at a certain point. It won't go any further unless I back out and try to get on it again...at which it will usually take off as it should. Tune and log attached...issue occurs at 00:42.

I'm also having issues with KR...but in weird areas. Also looks like burst knock, but I've got that disabled. So, if there's that jumps out, I'd appreciate the guidance.


e85e.hpt
e85e-3-scan.hpl

[eclipse5302]

Here is another example - issue starts at 10:31. Here I was able to back off the throttle then get back into it and recover.

weird-surge-18-44-24.hpl

[benf]

Have you tried gas from a different station just to rule out crap e85? I have been getting the same issue and plan to drive 35mins out of my way tomorrow to try gas from a different station just to make sure its not that. I typically show 75% alcohol content but wonder if the gas itself isnt good. My buddy with same tune and car gets gas from a different station and 81% content and no KR.

[eclipse5302]

I have tried gas from different stations. I don't believe this is actual knock, as the timing and engine load is fairly low. It might be something mechanical for all I know. I'll have to check again and make sure I'm not hitting anything.

Nobody has anything on the weird throttle position stuff?

[eclipse5302]

I was doing some more searching and reading about this, and I was starting to think the blade was getting pushed around by turbulence or whatever since it seemed to be random. I was logging last night and was able to catch it again, and I noticed that it's commanding the throttle to close and open (while accel pedal stays at 100%). See the attached log, it begins at 03:06. The current tune is attached as well.

e85ac.hpl
e85ac.hpt

BTW, since this trans can handle it, I've disabled all TQ management in the tune. I also disabled StabiliTrak during this run, so although it looks like something is trying to ruin the fun, nothing should be...

[eclipse5302]

Also, during the event, timing starts out where it should be, but then drops to the point that it ends up -13 degrees - even though there isn't any knock present. There is later, but that's another thing I'm still working on.