Gas Pedal Delay

dlmartin81 · 06-23-2010, 07:55 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.

Vegitto-kun · 06-23-2010, 09:05 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

m4a1mustang · 06-23-2010, 09:20 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, 09:39 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, 09:46 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.

dlmartin81 · 06-23-2010, 10:39 AM

To be honest, a video won't really do much justice because you have to be behind the wheel to feel what it is happening. Simply having a video showing the RPM behavior won't really help, I don't think. Because to the viewers, there will be a lot of unknowns, which will raise lots of questions (did you do..., that could be..., what was..., etc...).

But maybe I'm wrong.

Zeto · 07-07-2010, 10:32 AM

Can you explain the process m4a1? And what is CRC MAF cleaner?

m4a1mustang · 07-07-2010, 10:36 AM

Quote:

Originally Posted by Zeto

Can you explain the process m4a1? And what is CRC MAF cleaner?

It's an eletrical contact cleaner. I don't know if it's any different than other electrical cleaners but I figured the safest (and easiest) bet would just be to go with the CRC branded MAF cleaner that they sell at AutoZone. I'm sure they sell a MAF cleaner at all other auto part stores as well.

You just disconnect the MAF sensors from their connectors, then unscrew them from the MAF tube. Pull them out very carefully, holding at the base, and spray them per the instructions on the can (about 15 good sprays). Let it dry (it dries in seconds), and reinstall. Be careful not to touch the sensors with anything... they are very easily damaged.

If your sensors are dirty the ECU won't receive accurate or reliable air flow readings which can negatively impact engine performance.

While you're at it, clean your filter and airbox of dirt and debris. If a leaf or other debris makes it's way into the airbox it's possible that it could block a good portion of the filter, which can make a big impact in performance.

Zeto · 07-07-2010, 11:05 AM

Yea I just cleaned out my filters last night and ordered new K&N drop in filters. There were alot of leaves and even a piece of popcorn styrofoam in the box

I'll take a look at the MAF sensors today. Thanks +1!

Zeto · 07-07-2010, 11:07 AM

BTW do you a pic to see where the MAF sensors are located?

IcedZ · 07-07-2010, 11:25 AM

I'm going to clean mine within the next 2 hours... just bought CRC on lunch break. I'll post a pic when I do. All you need is a philips head screw driver.
It is in between the airbox and the throttle body.

Daishi · 07-07-2010, 11:37 AM

Ill probably try and clean my maf sensor too. I only have 11k miles on my 09 tho.

IcedZ · 07-07-2010, 01:32 PM

Did it, forgot to take pics. Parking lot test seems promising. I'll find out more on my drive home this evening. Try to get pics for you later, if needed still.

spearfish25 · 07-07-2010, 01:45 PM

How much cleaner can a sensor be if you just spray a fluid onto it and it evaporates? Seems like any grime would likely still be on the sensor. Be careful with spraying crap on these for no reason (like you have <10k mi on the car). A mistake will cost you $232 per side.

I'd suggest you get a scangauge and actually document a problem with your A/F ratios before you start f'ing with sensor cleaning.

dlmartin81 · 07-07-2010, 01:54 PM

Quote:

Originally Posted by spearfish25

How much cleaner can a sensor be if you just spray a fluid onto it and it evaporates? Seems like any grime would likely still be on the sensor. Be careful with spraying crap on these for no reason (like you have <10k mi on the car). A mistake will cost you $232 per side.

I'd suggest you get a scangauge and actually document a problem with your A/F ratios before you start f'ing with sensor cleaning.

I think that's why they have you spray it 15 times, per the instructions on the can. It's just like the PB Blaster. You spray that thing on rusted nuts and bolts a few times and literally watch rust chip off on its own after a few minutes. If they're able to make a fluid that does that to rust, I'm sure they can come up with an equivalent to get grime of sensors.

06-23-2010, 09:05 AM	#2 (permalink)
Vegitto-kun A True Z Fanatic Join Date: Feb 2010 Location: USA Posts: 2,011 Drives: 09 370Z Rep Power: 263	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 09:08 AM.

06-23-2010, 09:46 AM	#5 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1857	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

06-23-2010, 10:39 AM	#6 (permalink)
dlmartin81 Track Member Join Date: Dec 2008 Location: Chalfont, PA Age: 43 Posts: 923 Drives: 09 370Z Rep Power: 608	To be honest, a video won't really do much justice because you have to be behind the wheel to feel what it is happening. Simply having a video showing the RPM behavior won't really help, I don't think. Because to the viewers, there will be a lot of unknowns, which will raise lots of questions (did you do..., that could be..., what was..., etc...). But maybe I'm wrong. __________________ Dan F.I. SS CBE 18-R \|\| Llumar 40% tint

07-07-2010, 11:37 AM	#12 (permalink)
Daishi Track Member Join Date: Jul 2009 Location: NJ Posts: 683 Drives: 09 370z 6Speed Rep Power: 17	Ill probably try and clean my maf sensor too. I only have 11k miles on my 09 tho. __________________ Cobb Tuned \| Injen Intakes \| Fast Intentions Long Tube Headers \| Fast Intentions TDX Catback 18" Resonators CF Mufflers \| Tommy Kaira Hebi Bebi Shift Knob \| 19x9.5/19x10.5 Five Axis Design S5:F w/ 245/40/19 - 285/35/19 Hankook Ventus V12's

07-07-2010, 01:45 PM	#14 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1857	How much cleaner can a sensor be if you just spray a fluid onto it and it evaporates? Seems like any grime would likely still be on the sensor. Be careful with spraying crap on these for no reason (like you have <10k mi on the car). A mistake will cost you $232 per side. I'd suggest you get a scangauge and actually document a problem with your A/F ratios before you start f'ing with sensor cleaning. __________________ 2013 Cadillac V-Wagon, RIP Z

07-07-2010, 10:32 AM	#7 (permalink)
Zeto Track Member Join Date: Apr 2009 Location: North NJ Age: 41 Posts: 766 Drives: 09 Pearl White 370Z Rep Power: 267	Can you explain the process m4a1? And what is CRC MAF cleaner?

07-07-2010, 11:05 AM	#9 (permalink)
Zeto Track Member Join Date: Apr 2009 Location: North NJ Age: 41 Posts: 766 Drives: 09 Pearl White 370Z Rep Power: 267	Yea I just cleaned out my filters last night and ordered new K&N drop in filters. There were alot of leaves and even a piece of popcorn styrofoam in the box I'll take a look at the MAF sensors today. Thanks +1!

07-07-2010, 11:07 AM	#10 (permalink)
Zeto Track Member Join Date: Apr 2009 Location: North NJ Age: 41 Posts: 766 Drives: 09 Pearl White 370Z Rep Power: 267	BTW do you a pic to see where the MAF sensors are located?

07-07-2010, 11:25 AM	#11 (permalink)
IcedZ Base Member Join Date: Feb 2009 Location: Gainesville, FL Posts: 194 Drives: 09 370 Yellow, 6MT Rep Power: 17	I'm going to clean mine within the next 2 hours... just bought CRC on lunch break. I'll post a pic when I do. All you need is a philips head screw driver. It is in between the airbox and the throttle body.

07-07-2010, 01:32 PM	#13 (permalink)
IcedZ Base Member Join Date: Feb 2009 Location: Gainesville, FL Posts: 194 Drives: 09 370 Yellow, 6MT Rep Power: 17	Did it, forgot to take pics. Parking lot test seems promising. I'll find out more on my drive home this evening. Try to get pics for you later, if needed still.

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