Throttle response, 2012+ low fuel tank

Exhaust · 07-15-2015, 12:20 PM

Hello everyone, I am well aware of the fuel pump being an issue with this car or this could be entirely in my head. Does anyone else feel like the throttle response is severely degraded when below a quarter tank or just below half? I feel like when I floor it with fuel at these levels its noticeably different than having a full fuel tank. Am I crazy or is this related to the poor fuel pump?

Vbp6US · 07-15-2015, 12:35 PM

I think I feel that in my car as well. I don't think it's exclusive to 2012+.

kenchan · 07-15-2015, 12:37 PM

no idea. i fill at half and u should too... i guess.

BC416 · 07-15-2015, 12:43 PM

Are you sure it's not the summer heat dropping power a bit? This doesn't sound like fuel starvation as that seems to only happen when low on fuel and going WOT after taking a tight right hander.

Array · 07-15-2015, 12:48 PM

TBH, I feel like I have more power in my 2012 with less fuel vs more than half a tank.

Could be the lack of weight

kenchan · 07-15-2015, 12:49 PM

yah, if the fuel pump was dat smart it wouldnt stave itself while turning right very hard for long duration.

kenchan · 07-15-2015, 12:50 PM

flashing NO RIGHT TURN!

icon..

onzedge · 07-15-2015, 01:34 PM

I do not know, I never let my tank get less than 1/2 full.

If I ever have to make a run for it, I have a go-bag that I can toss in the Z and just split. I do not want to be worrying about getting gas too.

SouthArk370Z · 07-16-2015, 06:38 AM

BC416 is probably on the right track - the ECM cuts power when Intake Air Temperature (IAT sensor is in MAF) gets over ~90F. IAT can be quite a bit higher than ambient, especially when not moving.

onzedge · 07-16-2015, 07:03 AM

Quote:

Originally Posted by SouthArk370Z

BC416 is probably on the right track - the ECM cuts power when Intake Air Temperature (IAT sensor is in MAF) gets over ~90F. IAT can be quite a bit higher than ambient, especially when not moving.

Greetings, Mr. SouthArk370Z.

SouthArk370Z · 07-16-2015, 11:43 AM

Quote:

Originally Posted by onzedge

Greetings, Mr. SouthArk370Z.

How are things going up in NWA?

onzedge · 07-16-2015, 11:45 AM

Quote:

Originally Posted by SouthArk370Z

How are things going up in NWA?

Things are hot and humid but the project is going well.

IDZRVIT · 07-17-2015, 05:41 AM

An engine doesn't know the fuel tank level so as long as the fuel pump has suction the engine will perform the same at any fuel level.

FairladyZ10PG · 07-17-2015, 05:48 PM

Mine does the same thing when the whether gets hot

Extremely annoying....

onzedge · 12-19-2015, 05:38 AM

Quote:

Originally Posted by FairladyZ10PG

Mine does the same thing when the whether gets hot

Extremely annoying....

07-15-2015, 12:20 PM	#1 (permalink)
Exhaust Enthusiast Member Join Date: Mar 2015 Location: Nowhere Posts: 277 Drives: 2015 AT GM Z Rep Power: 26	Throttle response, 2012+ low fuel tank Hello everyone, I am well aware of the fuel pump being an issue with this car or this could be entirely in my head. Does anyone else feel like the throttle response is severely degraded when below a quarter tank or just below half? I feel like when I floor it with fuel at these levels its noticeably different than having a full fuel tank. Am I crazy or is this related to the poor fuel pump?

07-15-2015, 12:43 PM	#4 (permalink)
BC416 Track Member Join Date: Jun 2014 Location: NJ Age: 37 Posts: 718 Drives: 2012 KAD 6MT Rep Power: 592	Are you sure it's not the summer heat dropping power a bit? This doesn't sound like fuel starvation as that seems to only happen when low on fuel and going WOT after taking a tight right hander. SouthArk370Z likes this. __________________ F.I. / K&N / 180 / Forgestar

07-15-2015, 12:48 PM	#5 (permalink)
Array Enthusiast Member Join Date: Jun 2014 Location: home.jpg Posts: 286 Drives: '12 Pearly White Rep Power: 11	TBH, I feel like I have more power in my 2012 with less fuel vs more than half a tank. Could be the lack of weight kidkotic2001 likes this. __________________ 2012 370z 7AT- ES2 with PSS, K&N Drop-ins, LED's all around, Berk HFC, FI CBE non-res, KW V1's 2003 A4 5MT- The Beater

07-15-2015, 12:50 PM	#7 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	flashing NO RIGHT TURN! icon.. onzedge and BC416 like this.

07-15-2015, 01:34 PM	#8 (permalink)
onzedge A True Z Fanatic Join Date: Apr 2010 Location: Battle Lake MN Age: 64 Posts: 183,964 Drives: 370Z 240Z Rep Power: 2684736	I do not know, I never let my tank get less than 1/2 full. If I ever have to make a run for it, I have a go-bag that I can toss in the Z and just split. I do not want to be worrying about getting gas too. ajm216 and Lukcas61 like this. __________________ Koni\|Swift\|Michelin\|Motordyne\|Berk\|RJM Performance\|Gates\|SPL\|Motul\|Technafit\|Ate Super Blue\|Hawk Tommy Kaira\|Momo\|Optima\|Hella\|Hotchkis\|Red Line\|ZSpeed\|Stillen\|B&M\|H&R

07-15-2015, 12:35 PM	#2 (permalink)
Vbp6US Enthusiast Member Join Date: Nov 2011 Location: SoCal Posts: 442 Drives: 2009 370z MB 6MT Rep Power: 14	I think I feel that in my car as well. I don't think it's exclusive to 2012+.

07-15-2015, 12:37 PM	#3 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	no idea. i fill at half and u should too... i guess.

07-15-2015, 12:49 PM	#6 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	yah, if the fuel pump was dat smart it wouldnt stave itself while turning right very hard for long duration.

07-16-2015, 06:38 AM	#9 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	BC416 is probably on the right track - the ECM cuts power when Intake Air Temperature (IAT sensor is in MAF) gets over ~90F. IAT can be quite a bit higher than ambient, especially when not moving. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

07-17-2015, 05:41 AM	#13 (permalink)
IDZRVIT A True Z Fanatic Join Date: May 2009 Location: Halifax Posts: 1,659 Drives: '13 CTS-V, '76 Vette Rep Power: 27	An engine doesn't know the fuel tank level so as long as the fuel pump has suction the engine will perform the same at any fuel level. __________________ "America.... still builds rockets!" Vette: 355 cid, 400 rwhp '13 CTS-V Coupe: 6.2L LSA, 556HP

07-17-2015, 05:48 PM	#14 (permalink)
FairladyZ10PG A True Z Fanatic Join Date: Aug 2010 Location: SoCal-IE Posts: 1,890 Drives: PGraphite m6 Rep Power: 255	Mine does the same thing when the whether gets hot Extremely annoying.... __________________ ///MPPSK///M Performance FRONT SPLITTER///M Performance KIDNEY GRILLS///MPerformance CF MIRRORS///MPerformance CF SPOILER///AC SCHNITZER

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