Gas Pedal Delay

cfleming2226

Has anyone experienced a brief (about 3 - 5 sec) delay from the time you push down on the gas (floored it) to the time you actually accelerate?

I was out the other day about to merge (Honda with a tin can exhaust next to me) so I floored it to jump ahead of him and there was a good 3 sec delay ... really disappointed. Especially because in my head I was gonna own this guy, but by the time I accelerated I had to slow back down to let him in!

XwChriswX

I get the same thing, which is why I gradually press harder, instead of just flooring it... The delay is kind of an annoyance... Apparently the computer's reaction time from signal input to throttle response is not at the speed my mind wants it at lol.

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cfleming2226

I guess as long as its not a problem with the car I will adjust ... i just really get a kick when it tosses me back in my seat, and with I can make "racers" look silly!

Thanks for the responce!

xiven

just be careful...don't want to draw unnecessary attention to your car

LennyZCSD

Try disabling the VCD control...

cheshirecat

Eh, I shouldn't have to disable VDC to make a somewhat rushed left turn.

Just to elaborate, there was no traction loss and the clutch was fully disengaged. The car just kind of fell on its *** for a few seconds, then surged forward.

It was without a doubt an engine management issue. The management and engine (other than intake/exhaust) is stock. I agree that some sort of torque management is to blame.

It's a lot like what other people have described here.

Definitely an eye-opener.

wstar

You'd be surprised how subtly intrusive VDC can be. "Torque Management" is exactly what it's doing. It's a nice safety feature for the careless random driver who bought a Z for looks, but the way it operates it has no business being engaged on a sportscar being driven properly. I sometimes leave mine on for everyday driving in rainy conditions on unknown roads, where perhaps I can't predict every puddle I might slip on. But, IMHO, it's hard to accept any complaint about the throttle/engine/etc with VDC engaged, especially for remote diagnosis over the intarwebs. Step one is turn that button off and reproduce your scenario.

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LennyZCSD

You also have an automatic, so there is an extra step in the response. The rev up and the tranny downshift. That's why I only run a manual it's in gear and out of the gate a like gunshot..

juld0zer

aside from the obvious causes (intake air temp, coolant temp and oil temps), what else could be causing this throttle lag???

I've pretty much eliminated IAT as the cause.

I'm now leaning towards the EGR system which involves the CVTC system. EGR is intended to reduce emissions by reducing combustion temperatures....by filling part of the cylinders with exhaust gas to effectively reduce the available volume for oxygen to enter/fill the cylinder.

This is no easy fit-a-blank experiment and will need someone with tuning experience to chime in... i've got an Uprev tuner license so if someone can guide me, i am happy to guinea pig my car for the benefit of everyone as we try to solve this mystery once and for all.

SouthArk370Z

Knock sensor could be causing the problem. Going by what I've read on this site, vibration from the drivetrain or exhaust can also bang the sensor.

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flashburn

I notice you are in an auto, I'm guessing you aren't in manual mode at the time? It probably just isn't downshifting when you want it to. I have that happen sometimes, but usually it adapts pretty quickly to your current driving style. Or just switch to manual when you want to boogie down.

Vegitto-kun

It is actually faster in AT to floor it. since if you want to floor it in MT you need to put the gearbox in manual and then down shift to the right gear.

while in the AT mode you just SLAM your foot down and it instantly shifts to the lowest possible gear.

I never had this kind of delay other than the gearbox shifting

Jeffblue

isn't that only if you did it in regular D mode, if you were using the paddles (which i would imagine you would be if you were flooring it), it'd be the same.

I actually merged yesterday, and after i was at speed i realized i didn't even remember downshifting before i floored it (which i most certainly did)

luigi90210

I thought you can just hit the paddles and it will go into manual mode for a bit?

Tbh going into manual mode and downshifting is much faster than flooring it in D.when you choose the gear you want to be in, its instant power opposed to waiting for the car to downshift than getting the power.

Oh and you make it sound like its a pain to drive a MT, all I have to do is press the clutch and shift into a gear lower than overdrive(I usually shift into 4th) and I have my power lol.

Rui Z

Try turning the VDC off. VDC may be delaying the throttle response to prevent the tires from slipping. But once you turn it off, have fun crashing into a curb.