Gas Pedal Delay

ninous26 · 10-19-2010, 06:42 PM

I just figuered the better amperage would help send the signal volts faster.. But, I don't thing you can increase the speed of light so yeah lol.

6spd · 10-19-2010, 06:43 PM

No, the battery has nothing at all to do with this issue.

DIGItonium · 10-19-2010, 09:36 PM

I drove with the tech today. Unfortunately, it was barely 70F today so it was a hit and miss. Oil temps were around 200F. However, I did reproduce the lag while making a left turn in 1st with VDC off. I literally had 80% throttle and didn't let up. The tech had a confused look as we were making the turn. I also managed to apply moderate throttle in 2nd, and he felt the "clunking" feeling.

He says it feels like the engine is running lean and holding back power as if there is not enough fuel delivered.

I'm scheduled for Thursday assuming it is close to 80F and dry.

IcedZ · 10-19-2010, 11:17 PM

Quote:

Originally Posted by DIGItonium

I drove with the tech today. Unfortunately, it was barely 70F today so it was a hit and miss. Oil temps were around 200F. However, I did reproduce the lag while making a left turn in 1st with VDC off. I literally had 80% throttle and didn't let up. The tech had a confused look as we were making the turn. I also managed to apply moderate throttle in 2nd, and he felt the "clunking" feeling.

He says it feels like the engine is running rich and holding back power as if there is not enough fuel delivered.

I'm scheduled for Thursday assuming it is close to 80F and dry.

Please keep us updated! I'm going to have to reschedule mine. Work isn't permitting. Sucks too cuz I'm almost at 30k miles!

DIGItonium · 10-19-2010, 11:33 PM

Ooops... sorry I had to correct my post. He says it feels like the engine is running lean and holding back power. He asked about my aftermarket exhaust and losing back pressure, and I told him that there were owners with stock exhaust with the same issue. I also assured him that the cats are stock. It doesn't make sense because the car runs fine for the first several miles before acting up, so it can't be the exhaust.

As another member suggested, I'm wondering about fuel delivery.

So Thursday with maybe a scan gauge of some sort.

IcedZ · 10-19-2010, 11:34 PM

Makes more sense, I kinda figured that's what you meant.
Also, I'm going to try another experiment this weekend. I don't know that it's necessarily temperature related (but partially?), but just seems that way. Maybe it's mostly time related. Today I experienced the same issue at sub 200º oil temp. I was going to try to warm my car up only by idling and see if the "quick" / "slow" test will replicate by idling for 30 or so mins. That way oil temps will be minimal. I don't know much about this... but maybe it has to do with the fuel tables that the ECU creates. I believe those are filled, used, and updated dynamically. Maybe that doesn't make much sense either... dunno. Keep us updated though!

IcedZ · 10-20-2010, 09:23 AM

First, I apologize for my rambling...
As I was driving in this morning, I drove a little hard to get oil temps up to 200+ (not quite 220 like I wanted). Usually after this much time, and even at 200º, I would normally experience the problem at least a little bit. But I wasn't. My newest idea has to do with air density / MAF sensors. In the mornings (or at night), the air is cooler and more dense. In the middle of the day, the air is much less dense. So either the MAF sensors are giving erroneous data to the ECU, or the ECU algorithm is messed up (I find this unlikely, since the problem would be seen MUCH more often). This would directly affect fuel ratio being delivered to the system.
Just my 2 cents.

DIGItonium · 10-21-2010, 04:57 PM

No problems. I think the best way to summarize this problem is engine losing power during normal to rapid acceleration.

Man I had to reschedule. I had the car warmed up pretty good and was able to recreate the conditions. Hopefully conditions are good next week to test drive with the tech.

L8N8 · 10-24-2010, 09:38 PM

it does seem like 220deg is the magic number at which my car starts to have this issue. Temp is definitely playing a role since I had more headaches with this problem during the summer months.

6spd · 10-24-2010, 09:43 PM

maybe there are varying levels of damage control, you know, rather than just what they tell us happens at 260?

DIGItonium · 10-24-2010, 11:21 PM

Oil temp of 220F is easy to reference and reproduce the problem, but I have notice a little bit of roughness with acceleration around 200F. Hopefully I can schedule an appointment tomorrow afternoon. If you guys can, try to schedule an appointment with your techs for test so cases can be opened with Nissan. If they get enough complaints, then they can start looking into this issue.

IcedZ · 10-25-2010, 12:02 AM

Quote:

Originally Posted by DIGItonium

Oil temp of 220F is easy to reference and reproduce the problem, but I have notice a little bit of roughness with acceleration around 200F. Hopefully I can schedule an appointment tomorrow afternoon. If you guys can, try to schedule an appointment with your techs for test so cases can be opened with Nissan. If they get enough complaints, then they can start looking into this issue.

My appt is on November 1, 1pm.

DIGItonium · 10-25-2010, 08:09 AM

Quote:

Originally Posted by IcedZ

My appt is on November 1, 1pm.

Awesome. Today is the warmest day of the week. I called in this morning didn't get much luck scheduling another appointment.

Flyboy · 10-25-2010, 09:39 AM

After reading this I paid attention to my throttle response.

I have no delay what so ever.

it's a NISMO, but don't know if that matters.

I also don't feel the clutch issue people are talking about.

Zeto · 10-25-2010, 09:44 AM

Quote:

Originally Posted by Flyboy

I also don't feel the clutch issue people are talking about.

What clutch issue?

10-19-2010, 06:43 PM	#332 (permalink)
6spd A True Z Fanatic Join Date: Aug 2009 Location: South Florida Posts: 3,001 Drives: Q50RS Rep Power: 24	No, the battery has nothing at all to do with this issue. __________________ -Jay- jonathanjamesphotographer.com

10-19-2010, 09:36 PM	#333 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	I drove with the tech today. Unfortunately, it was barely 70F today so it was a hit and miss. Oil temps were around 200F. However, I did reproduce the lag while making a left turn in 1st with VDC off. I literally had 80% throttle and didn't let up. The tech had a confused look as we were making the turn. I also managed to apply moderate throttle in 2nd, and he felt the "clunking" feeling. He says it feels like the engine is running lean and holding back power as if there is not enough fuel delivered. I'm scheduled for Thursday assuming it is close to 80F and dry. __________________ Last edited by DIGItonium; 10-19-2010 at 11:30 PM. Reason: Typo...

10-19-2010, 11:33 PM	#335 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	Ooops... sorry I had to correct my post. He says it feels like the engine is running lean and holding back power. He asked about my aftermarket exhaust and losing back pressure, and I told him that there were owners with stock exhaust with the same issue. I also assured him that the cats are stock. It doesn't make sense because the car runs fine for the first several miles before acting up, so it can't be the exhaust. As another member suggested, I'm wondering about fuel delivery. So Thursday with maybe a scan gauge of some sort. __________________

10-19-2010, 11:34 PM	#336 (permalink)
IcedZ Base Member Join Date: Feb 2009 Location: Gainesville, FL Posts: 194 Drives: 09 370 Yellow, 6MT Rep Power: 16	Makes more sense, I kinda figured that's what you meant. Also, I'm going to try another experiment this weekend. I don't know that it's necessarily temperature related (but partially?), but just seems that way. Maybe it's mostly time related. Today I experienced the same issue at sub 200º oil temp. I was going to try to warm my car up only by idling and see if the "quick" / "slow" test will replicate by idling for 30 or so mins. That way oil temps will be minimal. I don't know much about this... but maybe it has to do with the fuel tables that the ECU creates. I believe those are filled, used, and updated dynamically. Maybe that doesn't make much sense either... dunno. Keep us updated though! Last edited by IcedZ; 10-19-2010 at 11:38 PM.

10-21-2010, 04:57 PM	#338 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	No problems. I think the best way to summarize this problem is engine losing power during normal to rapid acceleration. Man I had to reschedule. I had the car warmed up pretty good and was able to recreate the conditions. Hopefully conditions are good next week to test drive with the tech. __________________

10-19-2010, 06:42 PM	#331 (permalink)
ninous26 Base Member Join Date: Sep 2009 Location: Phoenix AZ Posts: 112 Drives: 03 G35 black 5AT Rep Power: 15	I just figuered the better amperage would help send the signal volts faster.. But, I don't thing you can increase the speed of light so yeah lol.

10-20-2010, 09:23 AM	#337 (permalink)
IcedZ Base Member Join Date: Feb 2009 Location: Gainesville, FL Posts: 194 Drives: 09 370 Yellow, 6MT Rep Power: 16	First, I apologize for my rambling... As I was driving in this morning, I drove a little hard to get oil temps up to 200+ (not quite 220 like I wanted). Usually after this much time, and even at 200º, I would normally experience the problem at least a little bit. But I wasn't. My newest idea has to do with air density / MAF sensors. In the mornings (or at night), the air is cooler and more dense. In the middle of the day, the air is much less dense. So either the MAF sensors are giving erroneous data to the ECU, or the ECU algorithm is messed up (I find this unlikely, since the problem would be seen MUCH more often). This would directly affect fuel ratio being delivered to the system. Just my 2 cents.

10-24-2010, 09:38 PM	#339 (permalink)
L8N8 Base Member Join Date: Feb 2010 Location: VA Posts: 36 Drives: fast, takes chances Rep Power: 15	it does seem like 220deg is the magic number at which my car starts to have this issue. Temp is definitely playing a role since I had more headaches with this problem during the summer months.

10-24-2010, 09:43 PM	#340 (permalink)
6spd A True Z Fanatic Join Date: Aug 2009 Location: South Florida Posts: 3,001 Drives: Q50RS Rep Power: 24	maybe there are varying levels of damage control, you know, rather than just what they tell us happens at 260? __________________ -Jay- jonathanjamesphotographer.com

10-24-2010, 11:21 PM	#341 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	Oil temp of 220F is easy to reference and reproduce the problem, but I have notice a little bit of roughness with acceleration around 200F. Hopefully I can schedule an appointment tomorrow afternoon. If you guys can, try to schedule an appointment with your techs for test so cases can be opened with Nissan. If they get enough complaints, then they can start looking into this issue. __________________

10-25-2010, 09:39 AM	#344 (permalink)
Flyboy Base Member Join Date: Jul 2010 Location: Destin, Fl Posts: 152 Drives: Nismo Rep Power: 14	After reading this I paid attention to my throttle response. I have no delay what so ever. it's a NISMO, but don't know if that matters. I also don't feel the clutch issue people are talking about.

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