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Thanks for confirming my thoughts Frost. Last night the stupidest of things happened with the truck we noticed tow haul only works in D3 put heres the kicker it neutrals 3rd gear but 1 and 2 work....

This harness was a nelson performance harness requiring tuning.

Yeah the truck has the adapt-o-harness on it so there wasnt any repinning required.

All Im still struggling to determine if the issue that Im having is a botched tune or something else. Can someone help me determine what is happening in the shift speeds D1 and D2 these are set to...

I have a 4l80e in a supercharged silverado 6.0 previously equipped with a 4l60e. I drove it with the scanner on it and it does certainly act funny especially when you move the gear indicator and look...

Thank you very much Jon S. forgive my lack of knowledge but where did you look to find that the segment swap was botched? I'm learning this tuning stuff but only know enough to be dangerous LOL. ...

Hey all Before I get flamed I did search and read but didn't seem to find my exact issue.
2004 siverado 4.8/4l60e swapped to a 6.0/4l80e. Trans is a fresh build and works perfectly with 3200 stall....

Hey all Before I get flamed I did search and read but didn't seem to find my exact issue. However, this is a 2004 siverado 4.8/4l60e swapped to a 6.0/4l80e. Trans is a fresh build and works...

OK got a chance to mess with the tune a bit after all this rain and fixing the boost leak. I backed off the manual boost controller to just have the wastegate run on the 8 lb spring. I notice a...

Alright guys 1st off I'm very grateful for you advice and 2nd it must suck for y'all to be so damn good. ;) I just completed the boost leak test (15 psi) again with a much less ghetto method, and...

Ok well evidently it is real knock. 87 octane with the 10% ethenal they offer around here isn't enough for the higher compression of the envoy or something. As soon as I removed the 5 deg knock...

Hey all, I got bored so on a whim i wanted to see if there was anything on the Envoy that could be cleaned up in terms of the factory tune. This vehicle is completely stock except for a Volant CAI it...

Hey all. I performed a boost leak test and i did find a couple small leaks, so good call there. Nothing nuts in my opinion but i did tighting the T-bolts and corrected the issue. The truck did sit...

Thanks Tal0n appreciate the help. I will answer the question you asked in order
The timing table does have a trough cut through it from where i was getting a bit of knock. I Subtracted the knock I...

Ok all Im back. I want you to see what you think of this. I took some time did more reading, lots of logging, big changes here and there but this I think is all the truck has. I forgot to mention...

ok. getting back to you.
DrLoch- comparing the tune file vs the stock tune file by way of spark in the areas you are concerned about are exactly the same. (2001 silerado 5.3) spark dwell is...

DrLoch - Ill take a look at the timing and address, but All I did is copy the Low Table to the High Table. That timing curve as far as i know is a stock table with the upper end dropped out of it for...

Ok. Its 90 degrees and 66% humidity today. But I think I'm zeroing in on it, trying to dial in the VE table from 0-90 KPA up to 4500 rpm or as best as i could on the road.
. There was a couple...

Ok guys I appreciate the help as always.

Basically it sounds like I need to start over.

I will post back with a new log and no WOT runs. Maybe you all will come back and check it out

Thank you this is exactly what I was looking for. I do admit i was struggling with the logging parameters and recently discovered the Dsteck 2 bar map wasn't agreeing with what was being logged(grAPH...

Any takers?

Hey guys. Wanna take a peak at this tune? It feels ok.... needs some help i think though i believe, mid range power seams a little delayed. I messed with timing and it knocked a bit but i was coming...

Alright all did some tuning over the last couple of days. update my VE table from my last log so. The next time i drive it it should be slightly better than the last. I did do some hand smoothing...

Thanks overbooster, I will address the issues with the stft's still being active I must have not clicked that box. I will see if that brings the commander afr and measure afr closer together and go...

Ok all. If you would kindly take a peek at this I would greatly appreciate it.

Truck spec's.
5.3 Z06 Cam, 243 heads, and LS6 intake, 72mm turbo charger 83lb/hr injectors.

First off I had the...