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Log first then tune. Setup histograms in VCM scanner based on tables in your VCM editor then go drive and copy and paste depending on what you are logging. There's a lot more to that, it isn't that...

That is very informative. I learned plenty from these few sentences. Thank you both for the responses.

If you're getting aggravated with my learning go reply on some other thread. Maybe there's a senior tuner somewhere needing help.

These two events. Remember, I'm new at this but I just think with it going a few trims lean could be causing the knock. It's not even like way too lean that's why I was thinking the VE won't do...

I'm the last person to want to play "swaptronics" with my daily hence why I'm asking the question and not making the change to figure it out myself. So I'm not able to adjust the volume of fuel...

Could I copy all injector data from ls1 stock file to my tune? I bored my 5.3 lm7 to 5.7 ls1 specs because of pitting and used the ls1 flat top pistons. The Tahoe is originally flex fuel and has 33lb...

Thanks for the quick response. I wasn't confident I did it right. I'm just going to make time and pull the cover. I've had transmission problems before and I think the trans tune is part of the...

I will need to do this, just haven't had the time. Thanks.

I have a 2003 Tahoe. I'm not sure what the gear ratio is. I swapped the differential once so RPO codes are no use. The original code is GT4. The donor car is long gone. It's on 32" tires. I want to...

Thank you!

Anyone?

Curious question. I'm pretty sure my weird shift feel is due to the spark retard vs. torque reduction table. During shifts, I can feel and hear the RPM drop, and it sounds exactly like you see the...

Here's my current tune with smooth VE and log with knock. I logged these before your responses.
141191
141192

The flex fuel was disabled because the commanded AFR was too rich for my liking. We don't have E85 around here so I didn't think twice about keeping that on. I was fighting AFR error logs showing...

Thank you all for the great ideas. I'm going to play around with the tune some more. I did suspect my stock exhaust but the cheaper route is trying to tune it out. If the tune doesn't make it better...

Thank you for your help with this.

I know its been a while but did you get this corrected? I'm trying to learn this tuning stuff so I browse this forum once in a while for ideas. This thread caught my attention because I have a...

Anyone?!

After bypassing the OEM radiator and routing trans lines to standalone transcooler I haven't seen the temps get above 170ishf. I also changed the torque converter to a 2800-stall FTI. I've been...

I'm happy with SD, MAF and fuel trims but there is knock between 2400 and 3200 rpm that I'm not understanding. I don't think it is false knock because it shows up at the same spots. I have halved...

How does this log look? 140425

How does this log look?140424

Just like the compare function in editor, I would like to use this post as a repository to see members' good scan logs for comparisons. Of course, many factors come into play like PIDS, engine...

This is my current tune file.140157

I do not understand what TCC slip should be on this setup so I'm looking for input on this issue. The trans oil seems to get warm pretty quickly.

2003 Tahoe, 32" tall tires. 3.73 gears (I think)...