So i have been searching the forum non stop for the issue that i was trying to explain in a previous post but not many of the members knew what i was talking about, figured someone by now has figured something out since the last post was around 2009. Here is the link to the topic being discussed on how once you let go of the gas, you feel the car slow down (usually in traffic, like when at a stop, you cruise up to 30-40 and let go and you immediately feel like it isnt coasting as it should be, thus using up more gas to push it forward)

https://g35driver.com/forums/v36-gen...celerator.html

 

that sounds to me like youre in a low gear for the speed at which you let off the gas...say if youre doing 30 mph in 4th or 5th gear, does it still do it? if so then i dont understand

 

I've noticed this as well when driving in rush hour situations... It happens minimally but when it does it makes me wonder. I'm thinking that the ecu may be adjusting to the stop and go etc. That's all I could come up with, and I think its less noticeable in the 37's because of the new tranny

 

I dont usually use manual mode as i drive mostly in the city, but i think ive tried it once before and if kept in 4th or 5th , it doesnt usually happen or as much as it is w\hen in D

 

Does it do it in DS mode?

 

I dont usually drive in DS mode because of all the NY traffic, but i think it still does if im driving under 40-50mph, it doesnt happen as much when on the highway because the car is always in 5th gear and isnt downshifting as quick as in city traffic.

 

same thing happens to me...car drops speed and fast...sucks in traffic

 

My car feels the same way. I have an 07' g35s 5AT. It feels like the second you let off the accelerator it starts to engine brake and slow the car down. It does this in every mode. It doesnt do it so bad in manual mode if you force it to be in a higher gear.

 

links aren't working

 

I've experienced such 'engine braking' and while I do not enjoy holding the gas down a little just to get that coasting feeling (rather than a light braking), I thought it was natural for my V36. I may take it in to get checked out in addition to the transmission lag i sometimes experience.

 

My guess is the very first person who had the car when the ecu was still learning the drivers habits maybe they were a very fast driver during that learning period of the first few thousand miles and so it got used to being in a lower gear always ready to get up and go

 

My thoughts exactly!! But shouldnt it relearn the driving habits after an ECU reset or do you mean its been learning it for too long? I really hope someone finds out what is causing this or maybe a TSB because many people have the same issue, probably an ecu update?

 

I don't think the "learn" function of the tranny's shifting is as indelible as you guys seem to be implying. If you suspect that's what's causing it, just pull your battery cable and let it reset.

 

I did the gas pedal ecu reset and it drove without a problem for like a day or two and then went back to the same way it was. IT felt so good letting go of the gas and it would roll with ease, maybe try the reset again and try not to drive aggressively and let it coast alot to let it learn ?

 

I have the exact same issues with my 08 G35x. I have only had the car for 3 months and I came from a car with a manual-6 which is probably making the problem more noticeable. What I find myself doing is shifting into neutral a lot when I am transiting from a high speed to a lower speed but don't need to stop (i.e. going from a 55 mph zone to a 30 mph zone). If I don't shift to neutral, my car goes from 55 to 30 very quickly by itself and I feel that I am then wasting gas as I have to then apply gas to maintain 30, where as if I shift to neutral, I can coast for a long time between 55 to 30 without using any gas.