Recently swapped my 05 Sierra that was a cammed 4.8, 4L80 to a 6.0, same 4L80, same 3600 stall etc. Also swapped to a TBSS intake, 50# flex injectors, Gold blade LS3 and an X link. The issue im having is the throttle is way too sensitive. Bumps in the road make it hard to maintain steady throttle. Taking off, its way too aggressive. I swapped the stock TB back on with no change and all ETC settings are stock. Any suggestions on a place to start?
So you put the stock throttle body back on and still sensitive?
Does your timing jump up really fast with throttle input?
Welp I guess the "50# flex injectors" but with Injector Flow Rate set to 40.7lb explains your 119% volumetric efficiency...
Originally Posted by SiriusC1024
Blindsquirell. I have copied and pasted your gen 3 data into it and the truck wont even move really. It just pops and stalls when on the gas. Ive tried multiple times with no luck. Truck runs on this tune pretty good aside from the sensitive throttle and it has a BAD surge when you tip into the throttle just barley at about 50ish mph steady cruise. I have played with some different injector data and i can make the surge SOME better but every change i have made injector wise, the truck feels down on power. Im open to any suggestions as Im currently working over my head.
Did you retune VE though?
Well how are you supposed to do that when it wont even move really it just pops and stalls when on the gas???/
Whatever gross adjustment to IFR do the same for the VE table. Let it idle. Bump the throttle. STFT correct and move along.
Well it runs much better on the tune file with the wrong data in it, so I don't think you guys know what your talking about.
Oh gotcha lol. I was confused.
I absoutley dont know what im talking about, if that wasnt already clear
I got to correct you, you got that backwards. Probably need to check fuel pressure.
My 2003 tahoe does this. I didn't think it could be the tune. I thought it was the gas pedal spring but I could be wrong. I have an x-link for an nnbs 4" electronic throttle body and intake as well.
Daily driven
Chevy Tahoe 5.3 bored to 5.7 3.898, flat top pistons
TSP 212/212 112 LSA CAM, beehive springs, 799 heads
TBSS intake and throttle body
4l60e with shift kit and 2800 FTI stall, corvette servo
This made me laugh.
It looks like the pedal setting was messed with. Looks like it set to spicy AF mode
pedal.png
Why would this have anything to do with it? This table is only to limit the max rotation of the throttle blade based on pedal position? The table that would do what you are thinking is the throttle blade desired area vs pedal position? (ecm) 33000
Last edited by abc; 09-17-2024 at 09:12 PM.
Agreed, maybe it doesn't. Why isn't it stock (he said they are all stock)? Does the x-link require it to set that way? I've heard messing with this table can cause weird issues. What happens if you mess with these settings causes it a problem with the TAC? Does it stop working or will it be erratic. Just odd the throttle tables have been messed with and he is having problems. Why not put it back to stock and see. It would probably be worth logging the throttle channels to see what it commanding and doing. It looks like it is set to a 5.9 liter, which isn't helping the fueling problem.
pedal 2.png
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