Gas Pedal Delay

DIGItonium · 03-12-2011, 02:55 PM

The weather is very nice with temps in the low 60s. Oil temps barely touch 200F from a whole day of driving. I was leaving from volleyball practice, started the car, and the it felt very good. Acceleration is smooth and quick without requiring much throttle input. After driving for awhile I started to bog the car more than usual as if I'm not giving enough gas when engaging 1st. I even killed it going in reverse. I made a left turn and tried to give it more gas and let it rev past 4k, but the car felt like it was struggling to move. The car felt like it had the power of a 4cy sedan going up a slope, and the acceleration was pitifully slow. Throttle response is fine. I can inch back and forth on it, and it responds immediately. It just has no power to move.

Therefore, I believe the engine is losing power after awhile regardless of oil temps. It idles fine, revs fine, but it literally has no power. The car felt heavier than usual. Turn the car off, let it cool for a bit, and the power comes back on tap for several minutes of driving before losing power again.

This explains the phenomenon of why a Hummer, Corolla, and even a G37 can casually out accelerate me through an intersection even if I gave it 50% throttle.

m4a1mustang · 03-12-2011, 03:28 PM

Quote:

Originally Posted by DIGItonium

The weather is very nice with temps in the low 60s. Oil temps barely touch 200F from a whole day of driving. I was leaving from volleyball practice, started the car, and the it felt very good. Acceleration is smooth and quick without requiring much throttle input. After driving for awhile I started to bog the car more than usual as if I'm not giving enough gas when engaging 1st. I even killed it going in reverse. I made a left turn and tried to give it more gas and let it rev past 4k, but the car felt like it was struggling to move. The car felt like it had the power of a 4cy sedan going up a slope, and the acceleration was pitifully slow. Throttle response is fine. I can inch back and forth on it, and it responds immediately. It just has no power to move.

Therefore, I believe the engine is losing power after awhile regardless of oil temps. It idles fine, revs fine, but it literally has no power. The car felt heavier than usual. Turn the car off, let it cool for a bit, and the power comes back on tap for several minutes of driving before losing power again.

This explains the phenomenon of why a Hummer, Corolla, and even a G37 can casually out accelerate me through an intersection even if I gave it 50% throttle.

I never said anything about it because it was pretty embarassing, but I got out-gunned once by a Prius at WOT because the car just wouldn't go without a 5k RPM clutch drop.

6spd · 03-12-2011, 07:45 PM

i definitely notice the power drop as the oil temp climbs, but not at that drastic a level. Maybe you guys just suck at driving, haha, j/k!

DIGItonium · 03-13-2011, 10:52 AM

Quote:

Originally Posted by m4a1mustang

I never said anything about it because it was pretty embarassing, but I got out-gunned once by a Prius at WOT because the car just wouldn't go without a 5k RPM clutch drop.

Haha... I'm not convinced if it's completely oil temperature related. I'm not much of a gear head, but I did some search on lack of acceleration and loss of throttle response. There were a few posts about faulty fuel pump. One member here suggested it as well.

I'm planning to get TT this July at Baker, and I believe the install process involves getting new spark plugs and upgrading the fuel pump. I'll get back with you guys later in July.

IcedZ · 03-13-2011, 01:33 PM

Quote:

Originally Posted by DIGItonium

The weather is very nice with temps in the low 60s. Oil temps barely touch 200F from a whole day of driving. I was leaving from volleyball practice, started the car, and the it felt very good. Acceleration is smooth and quick without requiring much throttle input. After driving for awhile I started to bog the car more than usual as if I'm not giving enough gas when engaging 1st. I even killed it going in reverse. I made a left turn and tried to give it more gas and let it rev past 4k, but the car felt like it was struggling to move. The car felt like it had the power of a 4cy sedan going up a slope, and the acceleration was pitifully slow. Throttle response is fine. I can inch back and forth on it, and it responds immediately. It just has no power to move.

Therefore, I believe the engine is losing power after awhile regardless of oil temps. It idles fine, revs fine, but it literally has no power. The car felt heavier than usual. Turn the car off, let it cool for a bit, and the power comes back on tap for several minutes of driving before losing power again.

This explains the phenomenon of why a Hummer, Corolla, and even a G37 can casually out accelerate me through an intersection even if I gave it 50% throttle.

YES! THIS! It feels VERY heavy. Temp has little to do with it I'm sure now. (I was quite convinced it was before). This happens with in city driving more than highway. I've had my car stall in reverse and first, and nearly stalled it several times since last summer due to complete lack of power. I know your feeling very well.

6spd · 03-13-2011, 08:02 PM

yeah, that ive never had before.

haggomyeggo · 03-15-2011, 09:32 AM

Quote:

Originally Posted by m4a1mustang

You'll notice with regular driving that with SRM on, the engine revs hold for a moment while you are shifting gears. With SRM off, the revs drop much more quickly.

The mass of the flywheel does have some effect, but there is a very noticable difference with SRM on and SRM off.

so i tried driving with the SRM off and yeah there is a difference with the SRM off. The engine responds when shifting up much quicker. However at the same time you miss those perfect blipped downshifts. I am ok at doing it but not as good as SRM.

its a hard decision to make sometimes but the car is simply great either way.

im saddened by the problems some of you are having with yours

IcedZ · 03-16-2011, 07:19 AM

Quote:

Originally Posted by haggomyeggo

so i tried driving with the SRM off and yeah there is a difference with the SRM off. The engine responds when shifting up much quicker. However at the same time you miss those perfect blipped downshifts. I am ok at doing it but not as good as SRM.

its a hard decision to make sometimes but the car is simply great either way.

im saddened by the problems some of you are having with yours

I'm even more sad

On another note, the tech that I worked with several months ago said he was going to call me about the 3rd week of march. Hopefully he can quantify the problem.
Again, I am encouraging those of us with the problems to go to Nissan about this. It needs to be heard.

GZ3 · 03-25-2011, 09:38 AM

any updates...am having this problem now...Feels like the car is accelarating out of 1-2nd gear using 5 or 6th...its happens only after a drive and the car is warm...fresh and cool in the AM it feels good. I also noticed that the exhuast note changes when it starts doing this...gets louder....feels like the car is losing "acclerating pressure" if that makes any kinda ******* sense...when this happens i starting hitting the throttle repeatedly 6-7 times in a row within 2 secs or so and it kinda corrects itself but still feels diff. I'm one of those people that has ZERO patience for BS like this, especially when there is no code or obvious specific factor....if this doesnt come to fix soon am trading...getting a KIA and procede to save for a GTR

spearfish25 · 03-25-2011, 11:00 AM

FWIW, intake air temps climb dramatically when you sit traffic in warm weather. Even in 40F weather, my IATs can go up to 140F. On a hot summer day, my guess is they go even higher and that really hurts performance leading to this 'lazy' feeling when driving around town.

m4a1mustang · 03-25-2011, 11:04 AM

Quote:

Originally Posted by spearfish25

FWIW, intake air temps climb dramatically when you sit traffic in warm weather. Even in 40F weather, my IATs can go up to 140F. On a hot summer day, my guess is they go even higher and that really hurts performance leading to this 'lazy' feeling when driving around town.

This problem is exacerbated in the D.C. Metro area due to the high levels of hot air coming out of Washington.

haggomyeggo · 03-25-2011, 11:56 AM

Quote:

Originally Posted by m4a1mustang

This problem is exacerbated in the D.C. Metro area due to the high levels of hot air coming out of Washington.

i thought there was poor traction in the DC area due to the high amounts of

m4a1mustang · 03-25-2011, 12:08 PM

Well that's the issue I am having with the 5.0 right now.

GZ3 · 03-25-2011, 12:13 PM

Quote:

Originally Posted by m4a1mustang

Well that's the issue I am having with the 5.0 right now.

Dude i was at the FORD yesterday looking into a white 5.0 base...they didnt have a 3.7, and they didnt want to give me enough for my trade, but i was sooo close to doing it....if they would have offered me another 2k for my Z i would have been all over it. Ever since this throttle gas pedal delay crap started i've been exploring my options...lol ...i had juust made peace with the high oil temps...now this....i may just got super chaep, get a kia, and save for a monster

haggomyeggo · 03-25-2011, 12:15 PM

Quote:

Originally Posted by m4a1mustang

Well that's the issue I am having with the 5.0 right now.

no your problem is that live rear axle setup from 1945....

03-12-2011, 02:55 PM	#526 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	The weather is very nice with temps in the low 60s. Oil temps barely touch 200F from a whole day of driving. I was leaving from volleyball practice, started the car, and the it felt very good. Acceleration is smooth and quick without requiring much throttle input. After driving for awhile I started to bog the car more than usual as if I'm not giving enough gas when engaging 1st. I even killed it going in reverse. I made a left turn and tried to give it more gas and let it rev past 4k, but the car felt like it was struggling to move. The car felt like it had the power of a 4cy sedan going up a slope, and the acceleration was pitifully slow. Throttle response is fine. I can inch back and forth on it, and it responds immediately. It just has no power to move. Therefore, I believe the engine is losing power after awhile regardless of oil temps. It idles fine, revs fine, but it literally has no power. The car felt heavier than usual. Turn the car off, let it cool for a bit, and the power comes back on tap for several minutes of driving before losing power again. This explains the phenomenon of why a Hummer, Corolla, and even a G37 can casually out accelerate me through an intersection even if I gave it 50% throttle. __________________ Last edited by DIGItonium; 03-12-2011 at 02:57 PM.

03-12-2011, 07:45 PM	#528 (permalink)
6spd A True Z Fanatic Join Date: Aug 2009 Location: South Florida Posts: 3,001 Drives: Q50RS Rep Power: 24	i definitely notice the power drop as the oil temp climbs, but not at that drastic a level. Maybe you guys just suck at driving, haha, j/k! __________________ -Jay- jonathanjamesphotographer.com

03-13-2011, 08:02 PM	#531 (permalink)
6spd A True Z Fanatic Join Date: Aug 2009 Location: South Florida Posts: 3,001 Drives: Q50RS Rep Power: 24	yeah, that ive never had before. __________________ -Jay- jonathanjamesphotographer.com

03-25-2011, 09:38 AM	#534 (permalink)
GZ3 A True Z Fanatic Join Date: Dec 2009 Location: SATX Posts: 3,296 Drives: Z Rep Power: 21	any updates...am having this problem now...Feels like the car is accelarating out of 1-2nd gear using 5 or 6th...its happens only after a drive and the car is warm...fresh and cool in the AM it feels good. I also noticed that the exhuast note changes when it starts doing this...gets louder....feels like the car is losing "acclerating pressure" if that makes any kinda ******* sense...when this happens i starting hitting the throttle repeatedly 6-7 times in a row within 2 secs or so and it kinda corrects itself but still feels diff. I'm one of those people that has ZERO patience for BS like this, especially when there is no code or obvious specific factor....if this doesnt come to fix soon am trading...getting a KIA and procede to save for a GTR __________________ 09 GT-R 12' 370Z 7AT HANDED DOWN 12'+13' 5.0 SOLD

03-25-2011, 11:00 AM	#535 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	FWIW, intake air temps climb dramatically when you sit traffic in warm weather. Even in 40F weather, my IATs can go up to 140F. On a hot summer day, my guess is they go even higher and that really hurts performance leading to this 'lazy' feeling when driving around town. __________________ 2013 Cadillac V-Wagon, RIP Z

03-25-2011, 12:08 PM	#538 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6962	Well that's the issue I am having with the 5.0 right now. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

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