Gas Pedal Delay

DIGItonium · 11-30-2010, 08:28 PM

It has been cold, and I still feel the car holding back power under 3k RPM regardless of oil temperature. Mine barely hits 180F all day. The feeling is rough as I progressively press down the pedal.

MichaelM · 12-01-2010, 12:30 PM

Quote:

Originally Posted by DIGItonium

It has been cold, and I still feel the car holding back power under 3k RPM regardless of oil temperature. Mine barely hits 180F all day. The feeling is rough as I progressively press down the pedal.

Have you checked your fuel rail (injectors) or your fuel pump...if it was a Carb it almost sounds like vapor lock??

IcedZ · 12-02-2010, 12:21 AM

Nevermind, it came back today.

import111 · 11-30-2010, 11:56 PM

I am still having the delay issue. Even if ambient temps are 40's and oil temp is 180 I still get the delay sometimes, but not all the time...which makes it suck that much more.

6spd · 12-01-2010, 06:13 AM

hasnt happened to me except for the one time i got the oil temp past 230. i wonder if we compare vins, if there is a certain stretch that has the issue?

SeeyaBud86 · 12-01-2010, 12:47 PM

Quote:

Originally Posted by 6spd

hasnt happened to me except for the one time i got the oil temp past 230. i wonder if we compare vins, if there is a certain stretch that has the issue?

6spd -

I have read some of the things that you have experienced, and I live in South Florida as well. My oil temp is usually always between 210-220. I believe it takes some power away from the car because its so hot here. I believe Mike (the powdercoater), had an issue similar to this (losing power) and he ended up finding out that it was a problem with his brake indicator being on, so the ECU though the brake pedal was being depressed.

For example:
I was at a stoplight one time and there was an Audi TTS behind me. When the light turned green I let off the clutch like normal and then hit the gas. Started shifting through the gears but since it was so hot outside and my palms were sweaty, I ended up missing 3rd gear because my hand slipped (my shift knob is CF and it can get slippery when its really hot). But I quickly put it in 3rd gear, and I as did that the TTS got in the middle lane on my right, and he actually started pulling on me(We were right next to each other but he was slowly creeping forward). I know I missed a gear, but in the higher speeds that car should not be able to keep up with the Z. Afterwards I looked at my oil temps and they were around 220-230. So I've alwasy felt like the car was kind of "holding back" ever since I've had it. Maybe like Mike, its a brake ECU issue?? I want to find out but I don't want to ask Nissan lol. They might tell me my warranty will be void.

6spd · 12-01-2010, 02:22 PM

Quote:

Originally Posted by SeeyaBud86

6spd -

I have read some of the things that you have experienced, and I live in South Florida as well. My oil temp is usually always between 210-220. I believe it takes some power away from the car because its so hot here. I believe Mike (the powdercoater), had an issue similar to this (losing power) and he ended up finding out that it was a problem with his brake indicator being on, so the ECU though the brake pedal was being depressed.

For example:
I was at a stoplight one time and there was an Audi TTS behind me. When the light turned green I let off the clutch like normal and then hit the gas. Started shifting through the gears but since it was so hot outside and my palms were sweaty, I ended up missing 3rd gear because my hand slipped (my shift knob is CF and it can get slippery when its really hot). But I quickly put it in 3rd gear, and I as did that the TTS got in the middle lane on my right, and he actually started pulling on me(We were right next to each other but he was slowly creeping forward). I know I missed a gear, but in the higher speeds that car should not be able to keep up with the Z. Afterwards I looked at my oil temps and they were around 220-230. So I've alwasy felt like the car was kind of "holding back" ever since I've had it. Maybe like Mike, its a brake ECU issue?? I want to find out but I don't want to ask Nissan lol. They might tell me my warranty will be void.

maybe, i dont know. maybe ill play with that one day, but as far as power goes, all cars are gonna lose some as temps go up, but what others are describing is worse than anything i ever feel, save the one time it happened to me above 230.

wierd.

DIGItonium · 12-01-2010, 06:35 PM

Quote:

Originally Posted by SeeyaBud86

Maybe like Mike, its a brake ECU issue?? I want to find out but I don't want to ask Nissan lol. They might tell me my warranty will be void.

I had the same problem and used masking tape and some paper as a shimmy. When testing it out my car screamed and spun tires. It was a totally different feeling. I took it in, but the tech said he couldn't move the brake switch any higher and suggested the shimmy solution.

Quote:

Originally Posted by MichaelM

Have you checked your fuel rail (injectors) or your fuel pump...if it was a Carb it almost sounds like vapor lock??

How do I check fuel pressure and the fuel pump? I don't smell any gas and the car never has any hesitation or start up issues. I definitely have to rev it past 3k RPM to get the car going, but under that it feels like it wants to bog especially when I give it more gas.

Zeto · 12-01-2010, 06:46 PM

Quote:

Originally Posted by DIGItonium

I had the same problem and used masking tape and some paper as a shimmy. When testing it out my car screamed and spun tires. It was a totally different feeling. I took it in, but the tech said he couldn't move the brake switch any higher and suggested the shimmy solution.

Any DIY?

DIGItonium · 12-01-2010, 07:08 PM

Quote:

Originally Posted by Zeto

Any DIY?

All the way back here:
Gas Pedal Delay

IcedZ · 12-02-2010, 12:24 AM

Quote:

Originally Posted by DIGItonium

I had the same problem and used masking tape and some paper as a shimmy. When testing it out my car screamed and spun tires. It was a totally different feeling. I took it in, but the tech said he couldn't move the brake switch any higher and suggested the shimmy solution.

I still experience it with the shim.

DIGItonium · 12-02-2010, 12:30 AM

Quote:

Originally Posted by IcedZ

I still experience it with the shim.

Ah yes you're probably right. BTW, my fuel sender went bad. On the next oil change I may have them replace it. Maybe they can inspect the hoses as one of the owners described some cracked plastic hose when removing and reinstalling the fuel pump.

import111 · 12-14-2010, 01:15 PM

Any new news on this. Would like there to be a known cause and/or a fix before I take my car to the dealer. Driving this car when this happens is very dangerous and this needs to be fixed.

Mandingo · 12-14-2010, 06:08 PM

Would love to hear what happened, IcedZ!

IcedZ · 12-15-2010, 08:35 AM

Sorry about that! Sometimes I just need a reminder...
Not much happened really. The guy came and drove my car for a while with me there. He brought Consult-II with him. He was not able to find anything "quantitatively" wrong, but he agreed there was something not exactly right. His initial reaction is that it is an ECU issue. Nothing came out of this visit. He said he will come back in January with some more equipment. He was very easy to work with and friendly. He gave me his cell phone #.
Hopefully more to come in January some time!
That being said, I highly recommend complaining about this and getting a special tech on your case. These techs are regional and they travel to different dealerships in regions to solve weird problems.

11-30-2010, 08:28 PM	#1 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 43	It has been cold, and I still feel the car holding back power under 3k RPM regardless of oil temperature. Mine barely hits 180F all day. The feeling is rough as I progressively press down the pedal. __________________

12-01-2010, 06:13 AM	#5 (permalink)
6spd A True Z Fanatic Join Date: Aug 2009 Location: South Florida Posts: 3,001 Drives: Q50RS Rep Power: 25	hasnt happened to me except for the one time i got the oil temp past 230. i wonder if we compare vins, if there is a certain stretch that has the issue? __________________ -Jay- jonathanjamesphotographer.com

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12-02-2010, 12:21 AM	#3 (permalink)
IcedZ Base Member Join Date: Feb 2009 Location: Gainesville, FL Posts: 194 Drives: 09 370 Yellow, 6MT Rep Power: 17	Nevermind, it came back today.

11-30-2010, 11:56 PM	#4 (permalink)
import111 Track Member Join Date: Feb 2009 Location: Tucson, AZ. Posts: 622 Drives: 09 Nissan 370Z Rep Power: 192	I am still having the delay issue. Even if ambient temps are 40's and oil temp is 180 I still get the delay sometimes, but not all the time...which makes it suck that much more.

12-14-2010, 01:15 PM	#13 (permalink)
import111 Track Member Join Date: Feb 2009 Location: Tucson, AZ. Posts: 622 Drives: 09 Nissan 370Z Rep Power: 192	Any new news on this. Would like there to be a known cause and/or a fix before I take my car to the dealer. Driving this car when this happens is very dangerous and this needs to be fixed.

12-14-2010, 06:08 PM	#14 (permalink)
Mandingo Track Member Join Date: Nov 2010 Location: Dallas Posts: 625 Drives: '10 370z 6spd Rep Power: 3371	Would love to hear what happened, IcedZ!

12-15-2010, 08:35 AM	#15 (permalink)
IcedZ Base Member Join Date: Feb 2009 Location: Gainesville, FL Posts: 194 Drives: 09 370 Yellow, 6MT Rep Power: 17	Sorry about that! Sometimes I just need a reminder... Not much happened really. The guy came and drove my car for a while with me there. He brought Consult-II with him. He was not able to find anything "quantitatively" wrong, but he agreed there was something not exactly right. His initial reaction is that it is an ECU issue. Nothing came out of this visit. He said he will come back in January with some more equipment. He was very easy to work with and friendly. He gave me his cell phone #. Hopefully more to come in January some time! That being said, I highly recommend complaining about this and getting a special tech on your case. These techs are regional and they travel to different dealerships in regions to solve weird problems.