Gas Pedal Delay

tjlazer

That's not it, it's a known issue with some. Even on 6MT. It might be related to intake temps. When I start having this problem I have to launch at 3000 RPMs to avoid this issue, very frustrating!

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2009 370Z Monterey Blue,Nismo Conversion,RE-11's, K&N Typhoon intakes,Blue Kickplates,Homelink,FI 18" CBE,ERZ HFCs,Hotchkis sways, Swift Spec-R, EVO-R Highwing, UPREV

FairladyZ40th

Oh then in that case, a tubbing will help you millions with this issue but yeah I agree. The temp makes the car lag. I just simply suggest a good venting body kit i.e. Fenders bumper and hood haha. Blast your heater with the windows down


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ZeN

Gents, it is 33-38 degC plus humid all year long here in Malaysia, i've been having this trottle delay since my 1st day ownership. Have anyone tried use another IAT sensor which has the same resistance curve as OEM and relocate it to the mouth of the intake? It is embarrassingly slow to take off in any low gear when the rpm is around 1-3k, above that it scream all the way to redline. In a heavy traffic jam, IAT is always about 40-50 degC above cabin ambient temp reading, i logged all this with OBD2 and Nissan Datascan III app since the car is JDM. No issue with brake switch as i can see the value for both sensor switched. Idle timing was awfully low at about 3 compared to 9 when cold start. The only thing i've been wanting to check is the knock register and MAP sensor barometer volt value but theres no parameter of it in the Android app i have, no codes either. Maybe that was caused of the timing retard, had checked flexplate and theres no crack. Also have tried removing the MAP sensor driving with CEL codes and it didnt improve or making it worst. Happen on either full tank of fuel or low. Only good temporary solution that work only for short period of time ~15 mins is refuelling when near empty ~ 40 litre. Nissan tech had even datalog with consult III while me driving and cant find anything wrong.

Intake were all stock with addition of 36 row Z1 oil cooler and 25 row AT cooler to the sides. I really hopes we as a community get to solve this teething heatsoak issue. Car had 125000 KM already since i daily drive it to work since 2010. My next fault finding would be to replace MAP sensor and see if it is faulty. Envy you guys in colder climate country.

juld0zer

ZeN,
Please refer to my earlier posts. I detailed exactly what you propose on doing. I have done it before and it works, and later on after a lot of research i went several steps further to restore a more consistent driving experience.

In short, the 370Z really suffers from heatsoaked intake air temperature sensor. All intake systems are affected. All your observations mirror mine so there is nothing 'wrong' with your car. It is doing everything as it is programmed to do. There is a solution but it's not for those who love to show off their engine bays - although it's definitely a conversation starter. Goodluck & happy modding!

vikingpilot

HI,

I have the same issues when it gets hot outside, my 370z turns into a Nissan Sentra.....Bogged down lethargic acceleration and laggy throttle response from idle up to about 3500RPM.

Did anyone come up with an ECU fix for this?

juld0zer

Has anyone approached Nissan to do a software update on the car or at least the ECU?

When i reflashed a different throttle map using Uprev, it cured it. Aside from the heatsoak issues but you need to determine which you have - heatsoak lag or the actual unrelated lag for no reason

cwrenny

This is definitely limp mode. I was having similar issues when I went to 3" MAF housings. Check to make sure there aren't any soft codes sitting in the background on your ECU. I've experienced limp mode multiple times with no CEL but the soft code was present in the background when I scanned it. Sometimes those soft codes can come and go if the problem is intermittent so scan the car often and maybe you can catch it. FYI between 2009 and 2014 Nissan used a P006A code (MAF/MAP to throttle position correlation) which came up often, even on factory stock cars. In later ROMs Nissan removed it because it was too problematic.

Side note: the wstar's 2300 throttle map is pretty good. That's what I'm running currently.. could be a bit more aggressive at lower RPMs But it does get the TBs open much quicker than stock and is stable over all

THE BULL

Hello everyone, I guess for documenting purposes and to find out what else have folks discovered in the 4 years that have passed since this.

I have gathered that one way to help with this delay is a tune, the other delay has to do with heat soak of the IAT. Lastly for those boosted, issues with the booster MAP.

Throttle pedal commanders seem not be as efficient after a tune.