Nissan 370Z Forum

Nissan 370Z Forum (http://www.the370z.com/)
-   Engine & Drivetrain (http://www.the370z.com/engine-drivetrain/)
-   -   Gas Pedal Delay (http://www.the370z.com/engine-drivetrain/20402-gas-pedal-delay.html)

wstar 08-01-2012 12:05 AM

Quote:

Originally Posted by IcedZ (Post 1847180)
Meaning is it a normal check-valve, or are they electronically controlled (sensor + actuator hooked into the car's computer).

Oh I missed this earlier. No sensor/actuator, just check-valve.

zguynate 08-01-2012 12:32 PM

This issue is whats keeping my 370 from being as enjoyable to drive as my 350z. Hopefully someone will be able to find a way to make the throttle response as responsive as the 350z.

kenny's 370z 08-01-2012 12:52 PM

call it bs or whatever but i grounded the tb's last night and today i noticed the response has improved even further on the same 2 mile stretch that has 4 sharp turns in 93 degree heat with the ac on.so far,i have noticed an improvement from the stuttering or lag or whatever.anything to help with that hesitation.i feel when i get my catch cans on and change plugs,i should be good.

edit;check this page out.its on a mazda but still.
http://www.mazdas247.com/forum/showt...udboxer)/page9

wstar 08-01-2012 01:48 PM

I'm dubious of the benefits of grounding the TB's. Maybe if you had an existing wiring problem with the throttle position sensors and/or actuators in them or something. Seeing as how the TBs aren't naturally grounded (connected to plastic intake), I'd imagine they wouldn't bother having the body of the sensor/actuator ground out to the TB to begin with (meaning, grounding the TB may do nothing electrically regardless), but I have to admit I haven't pulled the sensor/actuator out and looked.

The only thing less reliable than a butt dyno is a butt impression of gas pedal responsiveness issues :)

IcedZ 08-01-2012 03:32 PM

Quote:

Originally Posted by wstar (Post 1849287)
I'm dubious of the benefits of grounding the TB's. Maybe if you had an existing wiring problem with the throttle position sensors and/or actuators in them or something. Seeing as how the TBs aren't naturally grounded (connected to plastic intake), I'd imagine they wouldn't bother having the body of the sensor/actuator ground out to the TB to begin with (meaning, grounding the TB may do nothing electrically regardless), but I have to admit I haven't pulled the sensor/actuator out and looked.

The only thing less reliable than a butt dyno is a butt impression of gas pedal responsiveness issues :)

If you want to try the grounding thing, do not pay the crazy $ for a kit. Do a hack job yourself first for trial. Any 12ga or bigger speaker wire will work FINE.
Source: I am an electrical engineer.

prochobo 08-01-2012 06:25 PM

I've can honestly say I'm lucky and don't have this problem. In manual mode, throttle response isn't an issue; it just sucks waiting for the downshifting. VDC or no VDC, it's all good. Just my .02.

chops 08-01-2012 06:58 PM

Quote:

Originally Posted by IcedZ (Post 1849582)
If you want to try the grounding thing, do not pay the crazy $ for a kit. Do a hack job yourself first for trial. Any 12ga or bigger speaker wire will work FINE.
Source: I am an electrical engineer.

seriously, you can get the necessary wire from home depot for 20bucks with all the connections you'd ever want

IcedZ 08-02-2012 08:18 AM

Quote:

Originally Posted by prochobo (Post 1849885)
I've can honestly say I'm lucky and don't have this problem. In manual mode, throttle response isn't an issue; it just sucks waiting for the downshifting. VDC or no VDC, it's all good. Just my .02.

If you read through the thread, for the most part you'll see this problem doesn't plague automatics for the most part.

wstar 08-02-2012 09:45 AM

Well there's certainly nothing in the 6MT itself that would contribute to the issue, seeing as it's just a gearbox. If anything more people would complain of something like this on a 7AT than a 6MT, as there's a whole host of additional possible problems with the 7AT that could cause similar effects, on top of whatever's going on prior to the trans that some 6MT guys are seeing.

IcedZ 08-02-2012 01:26 PM

Quote:

Originally Posted by wstar (Post 1850707)
Well there's certainly nothing in the 6MT itself that would contribute to the issue, seeing as it's just a gearbox. If anything more people would complain of something like this on a 7AT than a 6MT, as there's a whole host of additional possible problems with the 7AT that could cause similar effects, on top of whatever's going on prior to the trans that some 6MT guys are seeing.

Read through the other 52 pages.

ChipsWithDips 08-02-2012 01:40 PM

I have done some datalogs my 370 and noticed that the throttle never opens all the way until RPM is above 2000. Is this what you guys are experiencing?

kenny's 370z 08-02-2012 03:17 PM

interesting link here.from my understanding of how the vvel works,it is my assumption that in the higher rpm band,the intake valves are letting more blowback in via higher valve lift vs lower rpm band via lower valve lift.could this be the culprit ? letting too much blowback in ?
Nissan Introduces New Engine Valve Control Technology - Variable Valve Event & Lift (VVEL)

wstar 08-02-2012 04:40 PM

Quote:

Originally Posted by IcedZ (Post 1851059)
Read through the other 52 pages.

My statement was based on logic, the other 52 pages are irrelevant in that sense.

binary0x01 08-02-2012 04:59 PM

Quote:

Originally Posted by wstar (Post 1851342)
My statement was based on logic, the other 52 pages are irrelevant in that sense.

Lol, that's actually a valid statement.

lemon-fresh 08-02-2012 06:39 PM

Quote:

Originally Posted by ChipsWithDips (Post 1851093)
I have done some datalogs my 370 and noticed that the throttle never opens all the way until RPM is above 2000. Is this what you guys are experiencing?

Pretty sure that's the issue. MT guys can just ride the throttle and then drop the clutch so they don't really experience the delay in the same way. Which makes me wonder why the AT is always rated as having quicker accel.


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