HELP - Fuel Gauge issues

triniboost · 04-23-2014, 10:30 AM

Has anyone had issues with their fuel gauge not working properly ( 2010 370Z)?

My issue, I left work with 1/4 tank of gas which at the time was accurate, by the time i got home 35miles away my fuel gauge said I had 1/2 tank of gas.

When I filled up my tank the following day the gauge displayed a full tank and appears to work correctly until Ii reach 3/4 tank and will stay at the point.

My typical total commute is ~80 miles day.

Has anyone had this issue?

IDZRVIT · 04-25-2014, 04:58 PM

I had my fuel gauge sending unit replaced under warranty because all the dots did not light up on the fuel gauge meter after a fill up and the mileage readings were going out of whack. others have had the same or similar problems.

megalapagas · 04-25-2014, 05:24 PM

This happened to me not too long ago.....My fuel gauge would ONLY stay at 1/2 a tank unless I filled her up too almost full but as I wasted the fuel it would stay at 1/2 ALWAYS. Long Story short my Fuel Pump/Assembly were defective and had it replaced with a new one via under warranty.

falconfixer · 04-25-2014, 05:35 PM

like others have said it's the sending unit on the fuel pump. Replace it under warranty and if you're out of warranty it's that all that hard changing a fuel pump/sending unit out.

IDZRVIT · 04-26-2014, 06:32 PM

Took my dealer 45 minutes to change it out. Can't be that difficult as Falconfixer noted.

SouthArk370Z · 04-26-2014, 08:12 PM

Probably the sending unit but I'd check the wiring at the tank to make sure the connector(s) and ground are nice and tight before changing it.

NOBLE|370Z · 04-27-2014, 10:36 AM

Fuel sending unit replacement fixed it for me.

NOBLE

triniboost · 05-01-2014, 02:19 PM

thank you for all the help guys, i know my next change

NORAIN · 07-20-2014, 06:07 PM

I just started having issues... I get in with a 1/4 tank, then within 2-3 miles it's on 1 dot. Then it goes from 50 miles or so til empty to -- within a couple more miles. It has happened twice in 2 weeks. Looks like a trip to the dealer for warranty work.

Running4Mayor · 07-21-2014, 08:16 AM

Quote:

Originally Posted by NORAIN

I just started having issues... I get in with a 1/4 tank, then within 2-3 miles it's on 1 dot. Then it goes from 50 miles or so til empty to -- within a couple more miles. It has happened twice in 2 weeks. Looks like a trip to the dealer for warranty work.

My '14 does the exact same thing but only in traffic on really hot days. I guess I should take mine in too.

ufoz8mycow · 02-24-2016, 10:15 AM

Quote:

Originally Posted by NORAIN

I just started having issues... I get in with a 1/4 tank, then within 2-3 miles it's on 1 dot. Then it goes from 50 miles or so til empty to -- within a couple more miles. It has happened twice in 2 weeks. Looks like a trip to the dealer for warranty work.

I just started having this issue but didn't want to start a whole new thread about it. Filled the car up on Saturday night and have only driven 175 miles since then. When I left for work this morning it showed a little under a half tank of fuel, then the low fuel warning light came on and started flashing that I only had 138 miles of range left (weird). By the time I got to work 22 miles away it showed completely empty, no dots, and no range. I threw 5 gallons of gas in it and no change.

My question is for you guys that have dealt with this issue out of warranty - how expensive of a fix is the fuel sending unit at the dealer? Does that Techron stuff actually clear the issue up or am I pretty much dealing with a replacement item now?

SouthArk370Z · 02-24-2016, 10:22 AM

Quote:

Originally Posted by ufoz8mycow

... My question is for you guys that have dealt with this issue out of warranty - how expensive of a fix is the fuel sending unit at the dealer? Does that Techron stuff actually clear the issue up or am I pretty much dealing with a replacement item now?

Having any work done at a dealer is going to be expensive. Steep markup on parts and a mechanic's time ain't cheap.

IIRC, the sending unit can be checked with a VOM (see other threads and FSM for details). If it checks out bad, it looks like a fairly easy DIY (at least one DIY thread on this site plus the FSM). If a search for "fuel pump" doesn't work, try "fuel starvation".

I doubt if Techron, et al, will clear up the problem at this point but it's worth a try.

TheWeez · 03-09-2016, 05:04 PM

My fuel gauge had been staying around full even after 120 miles but I am switching out the fuel pump when I install the BP kit. Anything else I need to replace if the sensor is bad?

Wilson2608 · 06-11-2016, 10:44 AM

Quote:

Originally Posted by TheWeez

My fuel gauge had been staying around full even after 120 miles but I am switching out the fuel pump when I install the BP kit. Anything else I need to replace if the sensor is bad?

If it is stuck at full it could be a bad ground as well.

Mitco39 · 07-21-2014, 09:10 AM

You guys are getting these weird readings when one of the 2 fuel level sending units start to act up. This car has 2 sensors, one on each side of the tank and it takes the measurements from both sensors and averages them together. So if you have one sensor starting to mess up (or possibly the float gets stuck) and it reads empty, but the other one is reading full then you will see a half tank on the dash.

I am actually surprised nissan didnt put a self check DTC to keep this from happening without a check engine light. Even Chevy has it set that if the fuel gauge does not move for a extended period of time it will throw a code and assume its faulty so that the driver does not run out of fuel somewhere and left scratching his head.

04-23-2014, 10:30 AM	#1 (permalink)
triniboost Base Member Join Date: Jul 2010 Location: houston Posts: 9 Drives: 10 370Z MT w/ Sp Rep Power: 15	HELP - Fuel Gauge issues Has anyone had issues with their fuel gauge not working properly ( 2010 370Z)? My issue, I left work with 1/4 tank of gas which at the time was accurate, by the time i got home 35miles away my fuel gauge said I had 1/2 tank of gas. When I filled up my tank the following day the gauge displayed a full tank and appears to work correctly until Ii reach 3/4 tank and will stay at the point. My typical total commute is ~80 miles day. Has anyone had this issue? briangz34 likes this.

04-25-2014, 04:58 PM	#2 (permalink)
IDZRVIT A True Z Fanatic Join Date: May 2009 Location: Halifax Posts: 1,659 Drives: '13 CTS-V, '76 Vette Rep Power: 27	I had my fuel gauge sending unit replaced under warranty because all the dots did not light up on the fuel gauge meter after a fill up and the mileage readings were going out of whack. others have had the same or similar problems. __________________ "America.... still builds rockets!" Vette: 355 cid, 400 rwhp '13 CTS-V Coupe: 6.2L LSA, 556HP

04-25-2014, 05:24 PM	#3 (permalink)
megalapagas Enthusiast Member Join Date: May 2013 Location: McAllen,TX Posts: 457 Drives: '10 370Z Tour A/T Rep Power: 12	This happened to me not too long ago.....My fuel gauge would ONLY stay at 1/2 a tank unless I filled her up too almost full but as I wasted the fuel it would stay at 1/2 ALWAYS. Long Story short my Fuel Pump/Assembly were defective and had it replaced with a new one via under warranty. __________________ GTM 34 Row Oil Cooler \| K&N Drop Ins w/ Z1's Post MAF Tubes \| F.I Non-Res'd 2.5" T.P w/ CF CBE \| Axis Wheels \| Piecing together My Own Custom T4 Top Mount Single Turbo Kit Still in the works \|

04-26-2014, 06:32 PM	#5 (permalink)
IDZRVIT A True Z Fanatic Join Date: May 2009 Location: Halifax Posts: 1,659 Drives: '13 CTS-V, '76 Vette Rep Power: 27	Took my dealer 45 minutes to change it out. Can't be that difficult as Falconfixer noted. __________________ "America.... still builds rockets!" Vette: 355 cid, 400 rwhp '13 CTS-V Coupe: 6.2L LSA, 556HP

04-26-2014, 08:12 PM	#6 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Probably the sending unit but I'd check the wiring at the tank to make sure the connector(s) and ground are nice and tight before changing it. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

04-25-2014, 05:35 PM	#4 (permalink)
falconfixer Track Member Join Date: Feb 2012 Location: 10aC Posts: 978 Drives: Taco Rep Power: 77	like others have said it's the sending unit on the fuel pump. Replace it under warranty and if you're out of warranty it's that all that hard changing a fuel pump/sending unit out.

04-27-2014, 10:36 AM	#7 (permalink)
NOBLE\|370Z Base Member Join Date: Sep 2011 Location: Calgary AB Posts: 61 Drives: 09 Nissan 370Z Rep Power: 14	Fuel sending unit replacement fixed it for me. NOBLE

05-01-2014, 02:19 PM	#8 (permalink)
triniboost Base Member Join Date: Jul 2010 Location: houston Posts: 9 Drives: 10 370Z MT w/ Sp Rep Power: 15	thank you for all the help guys, i know my next change

07-20-2014, 06:07 PM	#9 (permalink)
NORAIN Enthusiast Member Join Date: Jun 2013 Location: Wilmington, NC Age: 57 Posts: 323 Drives: 2011 370Z 6M SP Rep Power: 12	I just started having issues... I get in with a 1/4 tank, then within 2-3 miles it's on 1 dot. Then it goes from 50 miles or so til empty to -- within a couple more miles. It has happened twice in 2 weeks. Looks like a trip to the dealer for warranty work. Footloose301 likes this. __________________ Swift Springs\|265-305 RE-11\|Forgestar F14\|F.I. TDX S.S. 12" Res."Milled Out"\|K&N\|SPL\|Z1(34 row)oil cooler\|Z1 brake upgrade\|Hotchkis Zspeed\|Team Voodoo\|HPDEjunkie.com

03-09-2016, 05:04 PM	#13 (permalink)
TheWeez Base Member Join Date: Oct 2015 Location: Tampa Posts: 246 Drives: 370Z PG 6M ST Rep Power: 24	My fuel gauge had been staying around full even after 120 miles but I am switching out the fuel pump when I install the BP kit. Anything else I need to replace if the sensor is bad? __________________ "It's not fast enough" - Edgar J. Hoover

07-21-2014, 09:10 AM	#15 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 132	You guys are getting these weird readings when one of the 2 fuel level sending units start to act up. This car has 2 sensors, one on each side of the tank and it takes the measurements from both sensors and averages them together. So if you have one sensor starting to mess up (or possibly the float gets stuck) and it reads empty, but the other one is reading full then you will see a half tank on the dash. I am actually surprised nissan didnt put a self check DTC to keep this from happening without a check engine light. Even Chevy has it set that if the fuel gauge does not move for a extended period of time it will throw a code and assume its faulty so that the driver does not run out of fuel somewhere and left scratching his head. __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
gauge light issues -	tha_alabama	Exterior & Interior	7	06-12-2013 09:18 PM
Fuel Gauge	jackbelot	Nissan 370Z Warranty / Scheduled Maintenance / Servicing / Repairs	2	07-26-2012 09:30 AM
Fuel Gauge	MrZ	Nissan 370Z Warranty / Scheduled Maintenance / Servicing / Repairs	7	01-13-2012 03:12 PM
Air fuel ratio gauge	Zamir370z	Nissan 370Z General Discussions	6	10-03-2011 06:48 AM
Fuel gauge... HELP!	VancouverZ34	Exterior & Interior	9	07-04-2010 04:46 AM