YukonRally
Well-Known Member
- Joined
- Jul 8, 2017
- Threads
- 13
- Messages
- 78
- Reaction score
- 21
- Location
- Charles Town, WV
- Vehicle(s)
- '17 GT PP
- Thread starter
- #1
I have a 17 GT with 15k miles, and about a month ago I installed the VMP Gen 3R kit and did OPG/TG at the same time. The initial tune was a little jerky, and have been datalogging with VMP on getting it smoothed out. That has for the most part been resolved after 4 new tunes, but there is one thing that has been consistent that they so far have come up with no resolution for:
If I get into boost, at all, even for a split second, the gas pedal goes sort of "dead" for the first 1/4 of its travel. I can press the gas down, and the car decelerates like the throttle body is completely closed. If I press more than that, it will accelerate still, but the throttle becomes very on/off and difficult to modulate. Shifting in boost is very jerky.
Doing some experimenting, the gas pedal returns to normal function as soon as I dip below 2250 RPMs. It is very consistent, regardless of gear.
If I don't get into boost, the car behaves like normal regardless of the RPM range. Has anyone experienced anything like this before or have any ideas what might cause this? Thanks.
If I get into boost, at all, even for a split second, the gas pedal goes sort of "dead" for the first 1/4 of its travel. I can press the gas down, and the car decelerates like the throttle body is completely closed. If I press more than that, it will accelerate still, but the throttle becomes very on/off and difficult to modulate. Shifting in boost is very jerky.
Doing some experimenting, the gas pedal returns to normal function as soon as I dip below 2250 RPMs. It is very consistent, regardless of gear.
If I don't get into boost, the car behaves like normal regardless of the RPM range. Has anyone experienced anything like this before or have any ideas what might cause this? Thanks.
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