2017 GMC Denali..

[cardude2000]

Really? When I had my range I’m pretty sure I still felt it. Maybe I’ll have to get another range and test again.


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[jeffbco]

What your feeling is related to the AFM (active fuel management) programming. Get a Range Technology AFM Disabler and hesitation is gone.

AFM doesn't engage at idle so not sure how AFM gets the blame for this.

 

[WillCO]

Question.....on take off(from a stop position) is there a delay feel to it when you hit the gas, where it feels like its just not taking off right away and waiting a few seconds to finally pick up?

Test drove one and was curious if it was just me as I am used to my 06 Duramax taking off right when I hit the pedal or is it an issue with the Denali I test drove?

I believe it's normal. These throttles are electronic, and there is a "curve" programmed into them that tells the car how much throttle to apply for a given movement of the pedal. Many reviews I read before I bought mine commented that the programming was a little lazy. It's probably about CAFE standards.

I got used to mine and don't find it to be a problem needing solving. If you feel otherwise, there are some aftermarket solutions that can reprogram the throttle to behave differently. One such product is called a Sprint Booster (link). These do not add any power to your engine, they just make more of your throttle available in less pedal movement and they do give the car a feeling of increased urgency.

Full disclosure - several years ago I tried one of these on a BMW 5 series and found the effect to be way too extreme for my taste. The device programmed all of the throttle curve into the first 35% (ish) of the pedal movement. I took it off after a week. It's a 5 minute install though, and apparently newer models have variable boost ratios.

 

[cardude2000]

I believe it's normal. These throttles are electronic, and there is a "curve" programmed into them that tells the car how much throttle to apply for a given movement of the pedal. Many reviews I read before I bought mine commented that the programming was a little lazy. It's probably about CAFE standards.

I got used to mine and don't find it to be a problem needing solving. If you feel otherwise, there are some aftermarket solutions that can reprogram the throttle to behave differently. One such product is called a Sprint Booster (link). These do not add any power to your engine, they just make more of your throttle available in less pedal movement and they do give the car a feeling of increased urgency.

Full disclosure - several years ago I tried one of these on a BMW 5 series and found the effect to be way too extreme for my taste. The device programmed all of the throttle curve into the first 35% (ish) of the pedal movement. I took it off after a week. It's a 5 minute install though, and apparently newer models have variable boost ratios.

What people are talking about is the delay in the power being created after you touch the pedal.

I usually tap the pedal a second before I actually want to go to eliminate the delay. I have no idea why its like that but I dont think it has anything to do with AFM or torque curves etc. Frankly its probably to keep people from complaining that the throttle is 'too touchy' lol.

 

[BMPNUGLS]

AFM doesn't engage at idle so not sure how AFM gets the blame for this.

AFM does usually engage as your slowing down if enabled...slowing down it usually goes to V4 and once you punch the gas a "slight" hesitation will follow...documented on many other forums that disabling the AFM helps significantly

 

[WillCO]

What people are talking about is the delay in the power being created after you touch the pedal.

I usually tap the pedal a second before I actually want to go to eliminate the delay. I have no idea why its like that but I dont think it has anything to do with AFM or torque curves etc. Frankly its probably to keep people from complaining that the throttle is 'too touchy' lol.

Actually I think we agree. The aftermarket products I mentioned have nothing directly to do with AFM. They do nothing more than re-map the throttle to be more "touchy."

 

[cardude2000]

Actually I think we agree. The aftermarket products I mentioned have nothing directly to do with AFM. They do nothing more than re-map the throttle to be more "touchy."

Got it. Someone here mentioned the range device which has the sole function of disabling AFM.

 

[cardude2000]

AFM does usually engage as your slowing down if enabled...slowing down it usually goes to V4 and once you punch the gas a "slight" hesitation will follow...documented on many other forums that disabling the AFM helps significantly

OP is talking about hesitation from a dead stop.

 

[gat0r]

someone on another forum mentioned that the assembly that the pedal attaches to is plastic & there is some wiggle room in it. they resolved by putting a wedge or something to take up the movement

eta:
http://www.gm-trucks.com/forums/topic/167606-gas-pedal-flex-solution/

 

[soulsea]

Question.....on take off(from a stop position) is there a delay feel to it when you hit the gas, where it feels like its just not taking off right away and waiting a few seconds to finally pick up?

Test drove one and was curious if it was just me as I am used to my 06 Duramax taking off right when I hit the pedal or is it an issue with the Denali I test drove?

Probably driver error.

I'm sure a blackbear tune would resolve the issue, or maybe something like this: https://www.pedalcommander.com/prod...-v8-420-hp-2015-throttle-response-controller/