Oh snaps! I looked all over to see what you meant and just noticed his sig. I wonder if the spammer actually owns a 370Z. :icon14:

Seriously though, I turned off VDC this morning and throttle response was a bit better as if the Z wasn't holding back as much.

Reported ^

http://images47.fotki.com/v1462/phot...spamboy-vi.jpg

Throttle Response
 

I installed a Sprint Booster....love it....

???

I called the company and they said there was a problem with the Sprint Booster for the 370Z. Declined me placing an order. Did they fix that issue?

Read through the thread, and wanted to let you guys know I have the same issue with my 2010 at a low rpm then mashing, there is a delay. This is with a bone stock 370z with less than a 100 miles. Also when test driving an 09 at the dealership, same thing. Both manuals. I would assume as mentioned before that it has something to do with the ecu.

I know this is not why you are having that problem.
but didn't nissan change the pedal lay out in the 09.

I haven't noticed any kind of throttle lag what so ever on my Z and it's completely stock, with no mods of any kind.

I'm thinking I'll hook my OBDII interface upto my laptop this weekend and record some data from the throttle pedal sensor & the ETC (Electronic Throttle Control) sensors for comparison. I'll let you guys know what I find out.

You should try flooring the gas pedal and you will see there is throttle lag. I got no throttle lag now after the car was ECU re-flashed :tup:

A stock reflash? Did the dealer do it?

The car was tuned and reflashed by Technosquare.

When did you check with them? This is news to me....I have no problem it that I'm aware of...I'm going to have to call them

Sprint Booster
 

I have it on my 2010 370Z and love it....one of our members indicated that Sprint Booster was not working on the 370Z...not so..here's their #877-225-5577 ask for Steve or Shaun M and they will give the intel on this which is positive...MichaelM

it might have to do with the VVEL and the ECU. VVEL opens the intake valve wide open when you get on it allow for more air intake. mabye at such a low rpm it forces it to tun too lean flooding the cylinder with air until the ECU corrects and the injectors spray more fuel. mabye thats where the lag and sudden power is coming from and why its corrected when you tune. If you are going at a higher rpm there is more fuel being put into the cylinder and mabye thats why at higher rpm's (i.e. 3,500) there is nothing but power. I know when your MAF sensor is messed up that theres a lag when you get on it. the car runs too lean and there is a huge cut off at a certain rpm (3,000 rpm for me in scion tc). thats how it to me when this happens. My 2 cents and thoughts.

I've attached my email to them from back in February. They must have fixed the problem they were having.

My complaint with the stock throttle is the delay. Sit with the car in neutral and quickly depress and release the accelerator. In a Ferrari, you'd get a very fast rev and decel. In our car, there is a huge lag on the rev, the car holds the max revs for a second or two, and then it slowly decels. Sure the flywheel has some role, but I suspect the digital throttle is a bigger culprit. Did the Sprint Booster help with this at all?

I may just buy one and exercise the 30 day money back guarantee if it doesn't help things.

You've decribed my experiences exactly. Stock M6 2010 sport package with less the 2k miles. It's happened twice that were memorable and I was not in anyway way mashing the pedal but simply accelerating moderately from a stop light...the car barely moved into the intersection and then suddenly jolted forward like a rocket. The other time was turning right from a stop sign and even though I had lots of room to go, by the time the car responded (about ten feet after I had made the turn), I'm sure the car coming behind me had to brake. I've never seen any car that is so slow from a stand still sometimes and then it takes off like a rocket. Honestly this must look funny to bystanders; creep off the line and gone like missile. The VDC light doesn't come on so I don't think this is a nanny issue.

Has there been a consensus on a fix? Is it a fuel system issue?

You might have a misaligned brake switch as one of the members experienced and resolved. Try this method to resolve your throttle delay because it solved the issues I've been having for months. I posted pictures as a guide:
http://www.the370z.com/664697-post50.html

There are two things going for our 370Z in terms of throttle issues:

• Throttle Lag - Quickly press down the pedal, and the car stalls around 2k RPM before slowly rising to redline. It feels like VDC is kicking in, but there are no lights. This is a dangerous situation when making a turn and the car won't budge. There are numerous situations where you would accelerate and suddenly engine power cuts off or is limited for a few seconds. It's like the ECU is holding back power.
• Throttle Response - The throttle is less sensitive than the 350Z. Go test drive a 350Z and you find yourself giving gas too early between shifts, but you also find it easier to blip the throttle to downshift.

Try to resolve the throttle lag by visiting my post in the link.

As for throttle response, I'm at loss for words. Disabling VDC tends to improve throttle response because it seems like VDC is aggressive in cutting power even if there is no slippage. Plus, I notice power getting cut when oil temps hit 220F. I park somewhere, turn off the car, turn it back on, and the problem went away. It is annoying to feel abrupt power cut during normal acceleration as if it is being held back.

I think we need to take this up with Nissan.

I'm def going to check this out!

The Sprint Booster guys have confirmed that they have a 30 day money-back guarantee with no questions asked. I'll do this eventually but need the funds to keep the thing if I end up liking it. I'd suggest giving this a try if the throttle lag is bothering you and then report back to all of us.

Mike, can you elaborate on what you like about it and how it's improved things? My main issue that I'd like addressed is the slowness in throttle blips. If you sit in neutral and just blip the throttle, there is a huge delay in the revs building, then they hold for too long and slowly drop. My hope is the sprint booster addresses at least part of this issue.

This happens to me as well. At first I was turned off by it, but now, to lessen the effect of it, I accelerate slower. Though when I want to take off, I rev higher to get a quicker response.

What you are describing is what push me to install the sprint booster.
There are 3 positions with the sprint booster....stock...moderate and aggressive
you will notice and feel quite a difference.....let me know how it goes...Michaelm

Just installed the sprint booster and I had low expectations, but it is a very noticable difference, night and day!

But this issue could be resolved with a good custom tune?

How does this sprint booster effect wide open throttle for you guys who have it? Does it feel "normal" or is it blatantly noticeable where WOT occurs before the pedal is fully depressed?

This is my question also. Will a good tune help so you do not need the sprint booster?

I had a dyno tune done using the Cobb access port which I thought made a difference but the sprint booster just seems to have made the car a lot more responsive. In saying that, there are not a lot of tuning shops available in my area maybe someone with more experience with tuning 370's might get better results. But for the price I feel that the sprint booster has made for a much more spirited drive.

The Sprint Booster seems like it's just the thing for livening-up the Z's tepid throttle response, but the price seems a little steep. I know designing and making these products isn't cheap, but $330 is a lot of money for a product that only adjusts throttle response.

Heck, can't you buy a an ecu programmer with a canned tune for under $500? I think $150 for the Sprint Booster is more appropriate. At that price it's pretty much a no-brainer, those interested would buy it without thinking twice.

I would still like to know if a good tune can clear this up.. Can any of the guys/gals that have a tune chime in in a little greater detail?

Well I have an Uprev tune and I still have this issue.

that answers that... THX!

yeah thanks for the info! im getting my SB Tomorow, just got my stillen crank pulley installed today and didnt really notice a diff in throtle response :icon14: my mechanic told me if i wanted a real difference i should try the SB. and if i dont like it he takes it back simple as that :tup:

Does anyone have the 7AT that has this problem? I really don't think I've ever felt it... with or without a tune.

heuuu!!! i do :tiphat: and if i smash the pedal on a green light i get a 1sec delay all the time. anyway ill try it out tomorow and if its worth it im keeping it. :tup:

Hmm, does it happen every time? Any certain conditions needed? Granted, I'm not flooring it all the time, but I do my fair share of full throttle driving, and haven't noticed any delay like that.

I do have the '10 ECU in my car, but even then I didn't notice it when I had the '09 ECU either.

cant remember if its all the time... but 1 time is too many for me specially if a Suby jumps in front of me cuz of my damn throtle response :icon14:

Westwood, let us know how it goes!

Hmm I never heard of this SB thing before. Westwood im in for results as well. This is the first AT I have owned but anytime prior (including now) I noticed this issue on any AT I ever drove. Im suprised the MT of this car has the issue.

my mechanic told me its even better with auto tranys! well see... ill let you guys know tomorrow.

I was a sceptic and half expecting to take advantage of the money back guarantee but I was very pleasantly surprised, hope you have the same experience enjoy!