Gas Pedal Delay

Nico 6 · 06-22-2010, 10:25 AM

Blitz Thottle Controller will get rid of that lag. I was thinking of installing it on my G.

BLITZ POWER SITE / THROTTLE CONTROLLER

YouTube - Blitz throttle Control

It wont let me embed the video from yuotube for some reason

dlmartin81 · 06-22-2010, 10:38 AM

Quote:

Originally Posted by m4a1mustang

... If I give it throttle in 1st or second gear under 3k RPM it just bogs down and literally does nothing for a second or two... then it goes.

It's kind of funny because it throws me forward as I'm bracing for acceleration (it starts to go, then stops... waits, then goes). It's NOT VDC I can tell you that.

...

Now that I think about it, it behaves as if the car isn't picking up any fuel... I wonder if it could be a pickup issue?

You described my symptoms EXACTLY....and I have no mods at the moment. But it's not all the time. I think the hotter the car is (and even outside temps) the more likely it is for me to experience it.

cossie1600 · 06-22-2010, 11:35 AM

emission and fuel economy

IcedZ · 06-22-2010, 09:22 PM

Quote:

Originally Posted by dlmartin81

You described my symptoms EXACTLY....and I have no mods at the moment. But it's not all the time. I think the hotter the car is (and even outside temps) the more likely it is for me to experience it.

Agreed. Today was another rather hot day (96+) and my oil temps crept to about 225F with NORMAL driving. I decided to get on it, and sure enough, until about 3k RPM's it does next to nothing. I decided to mess around a little, so I turned Synchro mode off. It seemed to help. I turned it back on, and it was also better. However, there was a bit of traffic, so It may have cooled down just 5deg or so. So I am quite certain that oils temps are to blame (at least in my case). 225F or so causes some SERIOUS throttle issues.

dlmartin81 · 06-22-2010, 10:21 PM

Also...if I have the AC running, the symptoms are even worse.

Jordo! · 06-22-2010, 11:20 PM

With the A/C running, in part throttle at least, the compressor is syphoning off some power which will make it feel more laggy.

There's a bunch of little issues that might contribute to these driveability foibles (but again, I still see more 09 complaints... hmmm)

1. Hotter ambient temps (summer...) means less dense air, means less power,

2. No throttle cable means less response may be tuned in to improve emissions, ecomonmy, etc.

3. All EFI'd cars tend to have some spark retard on tip in to control torque and minimize drivetrain wear.

4. Some power will be lost as oil temps creep over 230*F.

5. Some power transfer may be minimized when VDC is on to improve traction.

Most of those issues are tunable/correctable...

m4a1mustang · 06-23-2010, 06:56 AM

Its not a tip in issue, though. Like I said before, initial response is there. It starts to pick up, then it faqlls on its face and throws you forward (because you were bracing for acceleration). The engine tries to wind up but there is no power... then 3-4 seconds later it takes off rather violently. It almost feels like it could be a problem with VVEL, where it is stuck in a limp mode then instantly switches over to full power.

ChrisSlicks · 06-23-2010, 08:27 AM

Quote:

Originally Posted by m4a1mustang

Its not a tip in issue, though. Like I said before, initial response is there. It starts to pick up, then it faqlls on its face and throws you forward (because you were bracing for acceleration). The engine tries to wind up but there is no power... then 3-4 seconds later it takes off rather violently. It almost feels like it could be a problem with VVEL, where it is stuck in a limp mode then instantly switches over to full power.

Hmm, that really doesn't sound good at all. Almost sounds like a fuel cut, but the question would be what is the cause of the cut? Could be VVEL, starvation or something else. I'm discounting VDC because you said it has happened with it switched off.

dlmartin81 · 06-23-2010, 08:55 AM

Quote:

Originally Posted by m4a1mustang

Its not a tip in issue, though. Like I said before, initial response is there. It starts to pick up, then it faqlls on its face and throws you forward (because you were bracing for acceleration). The engine tries to wind up but there is no power... then 3-4 seconds later it takes off rather violently. It almost feels like it could be a problem with VVEL, where it is stuck in a limp mode then instantly switches over to full power.

Once again, you described my symptoms exactly.

m4a1mustang · 06-23-2010, 09:00 AM

Quote:

Originally Posted by ChrisSlicks

Hmm, that really doesn't sound good at all. Almost sounds like a fuel cut, but the question would be what is the cause of the cut? Could be VVEL, starvation or something else. I'm discounting VDC because you said it has happened with it switched off.

The thing is, it even happens below full throttle as well. Case in point this morning... making a right turn from a stop sign onto a slow road, I eased out of the clutch and gave it probably 25% throttle at ~1500 rpm to briskly accelerate and again... nothing... then a surge of power after a few seconds of absolutely nothing.

I don't know if it's just me being over sensitive to the serious lack of torque in the 370Z, or if something may actually be wrong. I need to get the car on a dyno and probably see if I can drive another Z to compare the dynamics... Not quite sure what the hell is going on.

Above 4k RPM, though, the car feels like a champ.

Vegitto-kun · 06-23-2010, 10:05 AM

I don't understand this. I have a 2009 and I don't have this problem.

I have uber precise pedal response. a couple of months ago I had this problem slightly with the revs going higher around 4th gear but the car not accelerating for a second.

but now it is HIGHLY responsive. dear lord I can make the car shake all around while playing with my gas because it responses so hard

IcedZ · 06-23-2010, 10:07 AM

When I put the car in neutral and hood up with stereo, A/C off (so I can listen), I press the pedal down and I can hear a "woosh" of air being sucked into the intake, but no response for a couple of seconds. Again, I would like to point out that this is occurring only at temps ABOVE 220F.

m4a1mustang · 06-23-2010, 10:20 AM

Quote:

Originally Posted by Vegitto-kun

I don't understand this. I have a 2009 and I don't have this problem.

I have uber precise pedal response. a couple of months ago I had this problem slightly with the revs going higher around 4th gear but the car not accelerating for a second.

but now it is HIGHLY responsive. dear lord I can make the car shake all around while playing with my gas because it responses so hard

Again, this isn't a pedal response issue... this is something else. Pedal response on the car is fine for me.

Vegitto-kun · 06-23-2010, 10:39 AM

Quote:

Originally Posted by m4a1mustang

Again, this isn't a pedal response issue... this is something else. Pedal response on the car is fine for me.

I know but the point is, I don't have the lag the people here have and I don't understand why.

is it because I got the AT?

spearfish25 · 06-23-2010, 10:46 AM

Time to make a video and post it. Flooring it at 1500rpm will certainly have a sense of lag as the revs build a bit.

06-22-2010, 10:21 PM	#80 (permalink)
dlmartin81 Track Member Join Date: Dec 2008 Location: Chalfont, PA Age: 43 Posts: 923 Drives: 09 370Z Rep Power: 607	Also...if I have the AC running, the symptoms are even worse. __________________ Dan F.I. SS CBE 18-R \|\| Llumar 40% tint

06-22-2010, 11:20 PM	#81 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	With the A/C running, in part throttle at least, the compressor is syphoning off some power which will make it feel more laggy. There's a bunch of little issues that might contribute to these driveability foibles (but again, I still see more 09 complaints... hmmm) 1. Hotter ambient temps (summer...) means less dense air, means less power, 2. No throttle cable means less response may be tuned in to improve emissions, ecomonmy, etc. 3. All EFI'd cars tend to have some spark retard on tip in to control torque and minimize drivetrain wear. 4. Some power will be lost as oil temps creep over 230F. 5. Some power transfer may be minimized when VDC is on to improve traction. Most of those issues are tunable/correctable... __________________ Enjoy it. Destroy it. Last edited by Jordo!; 06-22-2010 at 11:23 PM.*

06-23-2010, 06:56 AM	#82 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6962	Its not a tip in issue, though. Like I said before, initial response is there. It starts to pick up, then it faqlls on its face and throws you forward (because you were bracing for acceleration). The engine tries to wind up but there is no power... then 3-4 seconds later it takes off rather violently. It almost feels like it could be a problem with VVEL, where it is stuck in a limp mode then instantly switches over to full power. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

06-23-2010, 10:05 AM	#86 (permalink)
Vegitto-kun A True Z Fanatic Join Date: Feb 2010 Location: USA Posts: 2,011 Drives: 09 370Z Rep Power: 262	I don't understand this. I have a 2009 and I don't have this problem. I have uber precise pedal response. a couple of months ago I had this problem slightly with the revs going higher around 4th gear but the car not accelerating for a second. but now it is HIGHLY responsive. dear lord I can make the car shake all around while playing with my gas because it responses so hard Last edited by Vegitto-kun; 06-23-2010 at 10:08 AM.

06-23-2010, 10:46 AM	#90 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	Time to make a video and post it. Flooring it at 1500rpm will certainly have a sense of lag as the revs build a bit. __________________ 2013 Cadillac V-Wagon, RIP Z

06-22-2010, 10:25 AM	#76 (permalink)
Nico 6 Base Member Join Date: Aug 2009 Location: Naples, FL Posts: 54 Drives: G37 Coupe Rep Power: 16	Blitz Thottle Controller will get rid of that lag. I was thinking of installing it on my G. BLITZ POWER SITE / THROTTLE CONTROLLER YouTube - Blitz throttle Control It wont let me embed the video from yuotube for some reason

06-22-2010, 11:35 AM	#78 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	emission and fuel economy

06-23-2010, 10:07 AM	#87 (permalink)
IcedZ Base Member Join Date: Feb 2009 Location: Gainesville, FL Posts: 194 Drives: 09 370 Yellow, 6MT Rep Power: 16	When I put the car in neutral and hood up with stereo, A/C off (so I can listen), I press the pedal down and I can hear a "woosh" of air being sucked into the intake, but no response for a couple of seconds. Again, I would like to point out that this is occurring only at temps ABOVE 220F.

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