Gas Pedal Delay

m4a1mustang · 08-17-2011, 10:14 AM

Quote:

Originally Posted by DIGItonium

Ha! So it was definitely not related, but I guess it's safe to assume 220F is when power starts cutting. Yet, I felt the lag past 190F. I will test low end response and heatsoak after getting the car back.

Quote:

Originally Posted by IcedZ

I felt the lag as low as 180 - 190 oil temps. Don't think it was oil.

Indeed. Regardless of oil temps I always had the lag/no power below ~4k issue.

Power in general was greatly reduced with oil temps running in excess of 220*F. On a hot summer day driving the Z almost felt like driving a Civic... it was just dog slow.

I believe they are two seperate issues. One related to ECU/VVEL controls and the other a byproduct of excessive heatsoak.

In comparison, my Mustang barely breaks a sweat when it's 105*F out and I have the A/C blasting. The two cars are like polar opposites when it comes to temperature sensitivity.

tjlazer · 08-17-2011, 11:42 PM

This has been happening to me too. Today it happened a lot. Was doing some testing. Oil temps were at 220 to 225 and it happened at every red light. Went to the grocery and when I got back on the road, temps were 180ish and it was gone for a while....

I have to have it way above 3000 rpms to combat this symptom. There were a few times it was a little hairy as I needed the power and it was not there. Could definitely be a safety issue.

I do have HAI's installed too. Hmmmm. Wonder if its hear soak and hi oil temps that are causing this. Since it happens when you are at a dead stop for a few minutes.

edit: outside temps were 80.

ChrisSlicks · 08-18-2011, 07:18 AM

Quote:

Originally Posted by tjlazer

This has been happening to me too. Today it happened a lot. Was doing some testing. Oil temps were at 220 to 225 and it happened at every red light. Went to the grocery and when I got back on the read, temps were 180ish and it was gone for a while....

I have to have it way above 3000 rpms to combat this symptom. There were a few times it was a little hairy as I needed the power and it was not there. Could definitely be a safety issue.

I do have HAI's installed too. Hmmmm. Wonder if its hear soak and hi oil temps that are causing this. Since it happens when you are at a dead stop for a few minutes.

Sounds like heat soak is affecting a sensor (which would make it worse when stationary), doesn't sound like oil temps are a factor.

tjlazer · 08-18-2011, 12:12 PM

Did more testing today on my way in to work. Outside temps were 58. Oil temps were just over 180 degrees, not once did the gas pedal delay happen. Tested it on many red lights... I think it's definately heat related.

DIGItonium · 08-18-2011, 01:38 PM

I wonder if some sensor(s) is getting heatsoaked and giving false readings. IIRC, I read about MAF sensors losing accuracy when it gets too hot. How about cam and crank sensors? It doesn't make sense because our motors idle smoothly. [shrugs]

m4a1mustang · 08-18-2011, 01:55 PM

That doesn't make much sense in my case, though, where I experienced the problem even while the engine was (relatively) cold. Same thing with Iced Z.

L8N8 · 08-18-2011, 09:32 PM

If it helps, since I've switched to the Nismo, I've noticed a very small lag in high temps with it as well but it does exactly what Digi described above. It cools down very quickly. I've done no mods to the car other than audio. I do plan on CAIs soon so I'll post if the small delay I notice decreases any further.

bplaya · 09-15-2011, 04:57 PM

Started noticing this problem this summer. I have a Nismo

IcedZ · 09-16-2011, 08:08 AM

Quote:

Originally Posted by bplaya

Started noticing this problem this summer. I have a Nismo

Wow. I 'd be REALLLLY p*ssed if that was happening with the Nismo.
Only thing I can say is what I said before: report it to Nissan. Not that it affects me anymore anyway.

DIGItonium · 09-16-2011, 10:03 AM

I've got the twins now, but I'm not sure what goes into the GTM Uprev flash. Throttle response feels the same, and the lag or loss of power is still noticeable if I punch it in 1st or 2nd from a roll at low revs. In regards to the throttle map, I didn't hear anything about it so I guess it's still the same.

cossie1600 · 09-16-2011, 01:23 PM

Drive by wire+emission control=laggy

ZForce · 09-17-2011, 12:36 PM

More like: drive by wire + VVEL+ heat soak = laggy

gmr19 · 09-17-2011, 09:59 PM

If it makes anyone feel better, my 2004 M3 has the same throttle response lag when you tap it real fast. Seems to be mainly a DBW issue.

ryan370zpower · 04-17-2012, 10:18 PM

any updates on this issue? my car has this issue so extremely bad... I almost got killed today trying to make a left turn at a traffic light where I barely moved and on-coming traffic almost tboned my *** into oblivion...

DIGItonium · 04-17-2012, 11:23 PM

Yea it stinks even with turbos. Some owners resorted to UpRev tune which alleviates this issue, and others used the Sprint Booster. I have the UpRev tune, but it's only to support forced induction. Anything related to the throttles is kept stock.

08-17-2011, 11:42 PM	#707 (permalink)
tjlazer A True Z Fanatic Join Date: Dec 2009 Location: Tacoma Age: 53 Posts: 2,496 Drives: Z34, R35 Rep Power: 19	This has been happening to me too. Today it happened a lot. Was doing some testing. Oil temps were at 220 to 225 and it happened at every red light. Went to the grocery and when I got back on the road, temps were 180ish and it was gone for a while.... I have to have it way above 3000 rpms to combat this symptom. There were a few times it was a little hairy as I needed the power and it was not there. Could definitely be a safety issue. I do have HAI's installed too. Hmmmm. Wonder if its hear soak and hi oil temps that are causing this. Since it happens when you are at a dead stop for a few minutes. edit: outside temps were 80. __________________ 2009 370Z Monterey Blue,Nismo Conversion,RE-11's, K&N Typhoon intakes,Blue Kickplates,Homelink,FI 18" CBE,ERZ HFCs,Hotchkis sways, Swift Spec-R, EVO-R Highwing, UPREV Last edited by tjlazer; 08-18-2011 at 12:13 PM. Reason: typos and added outside temp.

08-18-2011, 12:12 PM	#709 (permalink)
tjlazer A True Z Fanatic Join Date: Dec 2009 Location: Tacoma Age: 53 Posts: 2,496 Drives: Z34, R35 Rep Power: 19	Did more testing today on my way in to work. Outside temps were 58. Oil temps were just over 180 degrees, not once did the gas pedal delay happen. Tested it on many red lights... I think it's definately heat related. __________________ 2009 370Z Monterey Blue,Nismo Conversion,RE-11's, K&N Typhoon intakes,Blue Kickplates,Homelink,FI 18" CBE,ERZ HFCs,Hotchkis sways, Swift Spec-R, EVO-R Highwing, UPREV

08-18-2011, 01:38 PM	#710 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	I wonder if some sensor(s) is getting heatsoaked and giving false readings. IIRC, I read about MAF sensors losing accuracy when it gets too hot. How about cam and crank sensors? It doesn't make sense because our motors idle smoothly. [shrugs] __________________

08-18-2011, 01:55 PM	#711 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6962	That doesn't make much sense in my case, though, where I experienced the problem even while the engine was (relatively) cold. Same thing with Iced Z. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

09-16-2011, 10:03 AM	#715 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	I've got the twins now, but I'm not sure what goes into the GTM Uprev flash. Throttle response feels the same, and the lag or loss of power is still noticeable if I punch it in 1st or 2nd from a roll at low revs. In regards to the throttle map, I didn't hear anything about it so I guess it's still the same. __________________

08-18-2011, 09:32 PM	#712 (permalink)
L8N8 Base Member Join Date: Feb 2010 Location: VA Posts: 36 Drives: fast, takes chances Rep Power: 15	If it helps, since I've switched to the Nismo, I've noticed a very small lag in high temps with it as well but it does exactly what Digi described above. It cools down very quickly. I've done no mods to the car other than audio. I do plan on CAIs soon so I'll post if the small delay I notice decreases any further.

09-15-2011, 04:57 PM	#713 (permalink)
bplaya Base Member Join Date: Sep 2011 Location: USA Posts: 1 Drives: nismo Rep Power: 14	Started noticing this problem this summer. I have a Nismo

09-16-2011, 01:23 PM	#716 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	Drive by wire+emission control=laggy

09-17-2011, 12:36 PM	#717 (permalink)
ZForce A True Z Fanatic Join Date: Jul 2009 Location: Roseville, CA Posts: 2,359 Drives: 09 370Z Tour + Sport Rep Power: 21	More like: drive by wire + VVEL+ heat soak = laggy

09-17-2011, 09:59 PM	#718 (permalink)
gmr19 Base Member Join Date: Mar 2011 Location: St. Louis Posts: 116 Drives: '11 370Z 6MT Sport Rep Power: 14	If it makes anyone feel better, my 2004 M3 has the same throttle response lag when you tap it real fast. Seems to be mainly a DBW issue.

04-17-2012, 10:18 PM	#719 (permalink)
ryan370zpower Base Member Join Date: Oct 2010 Location: Usa Posts: 32 Drives: 2010 370Z Rep Power: 15	any updates on this issue? my car has this issue so extremely bad... I almost got killed today trying to make a left turn at a traffic light where I barely moved and on-coming traffic almost tboned my *** into oblivion...

04-17-2012, 11:23 PM	#720 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	Yea it stinks even with turbos. Some owners resorted to UpRev tune which alleviates this issue, and others used the Sprint Booster. I have the UpRev tune, but it's only to support forced induction. Anything related to the throttles is kept stock. __________________

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