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Lack of throttle response upon slowing down/re-accelerating (running ECUTEK)

438 Views 13 Replies 5 Participants Last post by  240Z TwinTurbo
Hey guys,
I'm experiencing some serious throttle response or lack thereof when slowing the car almost to a stop, then re-accelerating again. The acceleration unresponsiveness seems as long as 1-2 seconds sometimes. I mean I will really hit the throttle to the ground and there is no response. I installed a pedal commander today thinking that would alleviate the issue however it didn't

My car has the following specs **(Tuned on Ecutek)
2015 Premium
AAM Competition Stage 3 Tune (COBB)
3 in Boost Logic Intakes
Downpipes (AAM Competition R35 GT-R 3" High Flow Catted Downpipes (GESI HFC))
Tanabe exhaust
1300 IDX injectors
Upgraded fuel pumps (AEM’s 340lph)
Visconti speed density kit

I'm not sure what the issue could be, this wasn't an issue for me really when I was on COBB but started after switching to ECUTEK for some reason.

My tuner ran a log on my throttle vs my pedal depression and it wsa the following (You can see the blue line (throttle) lags the red line (acceleration):

Rectangle Slope Plot Line Triangle

This has been discussed in the following thread: Getting some serious hesitation from engine throttle (Post #36)
The issue was resolved by COBB via some Launch Control map update? However, that does me no good as I'm on ECUTEK.

Any thoughts on what this could be, has anyone seen this before running ECUTEK?

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1 - 2 of 14 Posts
I have seen the same issue a few times. I am pretty sure its transmission related, it feels like the transmission was about to downshift to 1st and then when you engage throttle again it delays. Log transmission and ask your tuner. The throttle won't engage until the shift is finished and at slow speeds it takes extra time.
It can be adjusted, you just need to delay when it shifts to 1st gear. It's all in the shift tables.
1 - 2 of 14 Posts