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I'm having the same issue stock 2008 tahoe 5.3, 8 deg of knock on a wot pull and 4 on light accel. Any ideas where to look first?

Am I talking to myself here? Not one comment or tip or little bit of guidance? I also sent an email to tech support over a month ago. Is this the won't part of the forum or just no one else has the...

Thanks for all the help

I have a 2004 Duramax that I can't read the ECM on, the vin shows up as scrambled symbols, I have tried turning off fast read also. I can read the transmission by itself though. I can also do a scan...

fuel pump resistor? does it stay running if you floor it

Figured it out, it was the dual speed fuel pump resistor that was burned out. It would start under full power then the fuel would cut off when it tried to switch to lower power.

I just picked up a new car for cheap cause it won't stay running. its a 3800 series2 sc with 190000 kms on it. I thought it might just be a clogged fuel filter or frozen fuel line but im not sure any...

I will try the knock sensor recalibration thing mmgt1 said right away.

I believe i did try that, seems like something that should be a given to me too. but how would you "adjust the PE tables"?

I messed with some transmission settings, 50 min 100 max, sped up the shift times a bit and pressures. it shifts better now, so thats a plus. I tried the tcc lock and was still getting kr, also put...

This is a log of were I'm at right now, I tried the ve tuning but it looks like the knock is back. Its definitely still shifting fine there is so much knock. any suggestions? same config as before.

I completed the ve tuning portion last night and got a pretty smooth curve and trims +-4 or so on a quick drive. man it sure bangs the gears when the maf is disabled... I need to calibrate the maf...

I will definitely take a look at that, but i believe the problem has been solved.
I grabbed 2 MAFs from the jy today and cleaned them up good. This is the log with the clean maf in and it seems to...

what if i unplugged the maf and tried a log running off ve. that would take the maf out of the equation right? I will see if i have a pressure gauge around too. if the plugs were bad it would be...

tonight i gave the intake a seafoam bath, changed the oil and fuel filter and maf again. reset the trims and took it for a drive and still got the same results. by looking at the log is it safe to...

here is the drive home using this config, but i dont have the wb o2
Like i said I'm new to this and don't know how to use this software completely but i get the theory. so any settings you can...

I think i was using default metric or the ecotec one.
I just found the gtp one on here is that a good one for these cars?

and here is the lunch log. definitely running better but the knock is still there

i went and filled it with premium last night and bought a fuel filter for it that i will replace tonight. Think i might even have a spare maf laying around i could toss in. Ya i should have grabbed...

So i just picked up this car, its got 150kms on it and seems to be in pretty good shape. I haven't pulled it into the shop to get into much yet but i did find that it has a K&N filter in the stock...