HELP - Fuel Gauge issues

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?

EVOHUNTER · 03-09-2016, 05:09 PM

I think youll need to buy the sending unit part. The pump Sasha provides is only a pump. Im assuming Nissan only sells the whole unit, at probably 1000$.

TheWeez · 03-09-2016, 05:11 PM

Looks like I have a single turbo Z for sale

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Justice97 · 06-08-2016, 12:58 PM

Just had the 1/2 tank symptom when i know there is less in tank.
Is the sending unit a dealer only item, I cannot find it anywhere?
Since I don't believe this is part of drive train I don't think they will replace it under warranty for me.

Wilson2608 · 06-10-2016, 09:21 AM

Hello all, I have had gas gauge issues as well. My car got stuck at half a tank, but would work fine above half. Anyways, the plastic housing that holds the pump, sending unit resistor, fuel temp sensor etc. was broken in half.

wtf. Nissan is charging me 500$ for a new plastic housing because it comes with a pump, temp sensor, and sending unit. Found a good deal going for roughly 350$ (if im remebering correctly) at Courtesy Nissan. This comes with a pump, temp sen, and fuel sending unit as well. As for me, I will wait for a more quality product to arise. Phunk will be making this product and he hopes to have it done by monday. Seriously guys, if you replace it through nissan it will break again. Get a nicer housing with a billet top and your good to go.

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.

TheWeez · 06-11-2016, 12:02 PM

It worked itself out. Thank you though. Now I get 15mpg lol

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Wilson2608 · 06-12-2016, 10:58 AM

Quote:

Originally Posted by TheWeez

It worked itself out. Thank you though. Now I get 15mpg lol

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what ended up being the problem? lol why are you getting 15 mpg?

TheWeez · 06-12-2016, 10:59 AM

No idea but it's accurate now
Being tuned safe for boosted applications and 750cc injectors

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Hotrodz · 06-12-2016, 03:29 PM

The mpg does not work because you have changed your injectors. Mine reads 3 and 4 mpg most of the time.

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TheWeez · 06-12-2016, 05:36 PM

When I put in 18 gallons and it is empty after 270 miles...

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Wilson2608 · 06-13-2016, 12:29 PM

Yeah I thought the mpg didn't change as long as you drove it lightly, but I don't know that for certain. I mean it makes sense, with X amount of air you'll have X amount of fuel. So if your just driving nicely and not under boost I was under the impression mpg would not change.

Hotrodz · 06-13-2016, 12:48 PM

I think Bullitt said that his guage read like 100 plus mpg and 12k miles till empty. Once you mess with the AFRS and the injectors the ecu is all kinds of confused. I just calculate mpg the old fashion way and because my gas gauge is unreliable I don't drive more than 250 miles before filling up. City only driving is no more than 150 because my right foot has a problem.

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TheWeez · 06-13-2016, 04:36 PM

I'm in boost everyday I drive

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03-09-2016, 05:04 PM	#17 (permalink)
TheWeez Base Member Join Date: Oct 2015 Location: Tampa Posts: 246 Drives: 370Z PG 6M ST Rep Power: 23	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

03-09-2016, 05:09 PM	#18 (permalink)
EVOHUNTER Track Member Join Date: Jul 2011 Location: Edmonton, Canada Posts: 681 Drives: BOOSTED3-7-0 Rep Power: 14	I think youll need to buy the sending unit part. The pump Sasha provides is only a pump. Im assuming Nissan only sells the whole unit, at probably 1000$. __________________

03-09-2016, 05:11 PM	#19 (permalink)
TheWeez Base Member Join Date: Oct 2015 Location: Tampa Posts: 246 Drives: 370Z PG 6M ST Rep Power: 23	Looks like I have a single turbo Z for sale Sent from my iPhone using Tapatalk __________________ "It's not fast enough" - Edgar J. Hoover

06-10-2016, 09:21 AM	#21 (permalink)
Wilson2608 Enthusiast Member Join Date: Dec 2014 Location: Nashville Posts: 301 Drives: Nissan 370Z Sport Rep Power: 10	Cj motorsports Hello all, I have had gas gauge issues as well. My car got stuck at half a tank, but would work fine above half. Anyways, the plastic housing that holds the pump, sending unit resistor, fuel temp sensor etc. was broken in half. wtf. Nissan is charging me 500$ for a new plastic housing because it comes with a pump, temp sensor, and sending unit. Found a good deal going for roughly 350$ (if im remebering correctly) at Courtesy Nissan. This comes with a pump, temp sen, and fuel sending unit as well. As for me, I will wait for a more quality product to arise. Phunk will be making this product and he hopes to have it done by monday. Seriously guys, if you replace it through nissan it will break again. Get a nicer housing with a billet top and your good to go. __________________ Stillen G3, z1 Intake Manifold, Stillen Headers, Z1 HFC's, Stillen Catback. 330whp 267 ft- lbs tuned at Z1 motorsports.

06-11-2016, 12:02 PM	#23 (permalink)
TheWeez Base Member Join Date: Oct 2015 Location: Tampa Posts: 246 Drives: 370Z PG 6M ST Rep Power: 23	It worked itself out. Thank you though. Now I get 15mpg lol Sent from my iPhone using Tapatalk __________________ "It's not fast enough" - Edgar J. Hoover

06-08-2016, 12:58 PM	#20 (permalink)
Justice97 Enthusiast Member Join Date: Sep 2013 Location: San Antonio Posts: 387 Drives: 11 370Z MB M6 Rep Power: 15	Just had the 1/2 tank symptom when i know there is less in tank. Is the sending unit a dealer only item, I cannot find it anywhere? Since I don't believe this is part of drive train I don't think they will replace it under warranty for me.

06-12-2016, 10:59 AM	#25 (permalink)
TheWeez Base Member Join Date: Oct 2015 Location: Tampa Posts: 246 Drives: 370Z PG 6M ST Rep Power: 23	No idea but it's accurate now Being tuned safe for boosted applications and 750cc injectors Sent from my iPhone using Tapatalk __________________ "It's not fast enough" - Edgar J. Hoover

06-12-2016, 03:29 PM	#26 (permalink)
Hotrodz Premium Member Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684384	The mpg does not work because you have changed your injectors. Mine reads 3 and 4 mpg most of the time. Sent from my SM-N910P using Tapatalk __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

06-12-2016, 05:36 PM	#27 (permalink)
TheWeez Base Member Join Date: Oct 2015 Location: Tampa Posts: 246 Drives: 370Z PG 6M ST Rep Power: 23	When I put in 18 gallons and it is empty after 270 miles... Sent from my iPhone using Tapatalk __________________ "It's not fast enough" - Edgar J. Hoover

06-13-2016, 12:29 PM	#28 (permalink)
Wilson2608 Enthusiast Member Join Date: Dec 2014 Location: Nashville Posts: 301 Drives: Nissan 370Z Sport Rep Power: 10	Mpg Yeah I thought the mpg didn't change as long as you drove it lightly, but I don't know that for certain. I mean it makes sense, with X amount of air you'll have X amount of fuel. So if your just driving nicely and not under boost I was under the impression mpg would not change. __________________ Stillen G3, z1 Intake Manifold, Stillen Headers, Z1 HFC's, Stillen Catback. 330whp 267 ft- lbs tuned at Z1 motorsports.

06-13-2016, 12:48 PM	#29 (permalink)
Hotrodz Premium Member Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684384	I think Bullitt said that his guage read like 100 plus mpg and 12k miles till empty. Once you mess with the AFRS and the injectors the ecu is all kinds of confused. I just calculate mpg the old fashion way and because my gas gauge is unreliable I don't drive more than 250 miles before filling up. City only driving is no more than 150 because my right foot has a problem. Sent from my SM-N910P using Tapatalk briangz34 likes this. __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

06-13-2016, 04:36 PM	#30 (permalink)
TheWeez Base Member Join Date: Oct 2015 Location: Tampa Posts: 246 Drives: 370Z PG 6M ST Rep Power: 23	I'm in boost everyday I drive Sent from my iPhone using Tapatalk __________________ "It's not fast enough" - Edgar J. Hoover

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