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Please share some info on this? I have heard about unlocking one, but, always good to learn how for future usage.

I can't believe in this day and age some shops still 'tuner lock' ECMs.

Some high horsepower race thing, sure, that's your secrets and a compleltley different level of tuning..

A gen 3 sierra...

although i agree with you, its not needed in this case.
I'm asking for the preferred method to get a snappy throttle.

Simply zeroing out an entire section, to me, seems sloppy.

So, what...

what is a chassis tune? what is a driveway tune?

also post up your tune and a datalog so we can see something besides a random piston picture please

P59

stock everything, DBW 2003 truck.

Ive looked through pages in here and found many different suggestions on how to make that rev idle hang less, or completely gone.

Ive watched video's,...

this is an engine, not a cat.

big difference

until you post up your tune and log we cant do anything to help you at all.
also you need to tell us about your engine, and other modifications you have done, such as exhaust.
you paint the...

NGK-BR7EF at high boost

i like this for plugs https://sites.google.com/site/sloppywiki/everything-ls/spark-plugs

this is also a great resource for idle tuning
https://forum.hptuners.com/showthread.php?36318-Idle-Tuning-How-To-amp-Guide-(w-pictures)

can you please explain this a bit more in detail?

Also your PE is odd as well as your VE tables. -neither of these will help your start up issue.

Need to know more about the injector info, and...

top of the morning to ya.

sorry, typical yank here.

why dont you tell us more about your vehicle.
engine, parts used, transmission, stall, gear ratio, cam etc.

your VE and spark tables are...

i know its out of the budget, but can you run one of these from TS or Tick?
theyre amazing.
https://www.texas-speed.com/p-11959-shearer-fab-intercooler-for-tsp-titan-intake-manifold.aspx

have you tried to start it at all?

this right here.
meth injection is nice, but, its not reliable. Over 100 degree temps, i get it, i live in phx, you cant be messin around, you lose that meth, you lose an engine.

sometimes it is easier to load in a stock LS1 tune file, and start fresh.
Especially if you are tuning an already bad tune.

no only admin in here can close/delete threads.

https://forum.hptuners.com/showthread.php?36318-Idle-Tuning-How-To-amp-Guide-(w-pictures)

start here to get it running.
and then post up your scan file afterwards. Then we can help you learn to...

start here

https://forum.hptuners.com/showthread.php?36318-Idle-Tuning-How-To-amp-Guide-(w-pictures)

Chris@HPTuners; Bill@HPTuners


close this thread please.
its duplicate at https://forum.hptuners.com/showthread.php?109082-Need-help-with-stumble-and-tune-for-sure&p=775358#post775358

hptuners website, log in, and then click your name.

144817

have you started here?
https://forum.hptuners.com/showthread.php?36318-Idle-Tuning-How-To-amp-Guide-(w-pictures)

and you always will on a street vehicle
you can never get it 100% perfect
Thats why we have closed loop and O2 sensors to keep it all in line

are you using the tire wizard or blue car software to change it ?

i dont have aprndl swithc on my truck. I have it look for what gear internally. There is a selection for that in the transission tab.
been like that for 5 years

So that answers the what question for cylinder #7....what about 1, 4, and 6?