HELP - Fuel Gauge issues

triniboost

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

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.

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megalapagas

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.

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falconfixer

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

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

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SouthArk370Z

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.

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NOBLE|370Z

Fuel sending unit replacement fixed it for me.


NOBLE

triniboost

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

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.

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Running4Mayor

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

Mitco39

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.

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phunk

the 2 level sensors are wired in a series, yet have different resistance range. go figure.

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Mitco39

Really? lol I guess thats probably to put some bias towards one side of the tank, I would assume the passenger one where the fuel pump is. That would explain the tank level dropping on hard right hand turns.

Either way you think it would have a check of some sort to let you know that the fuel level was inaccurate.

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Tadpole

My Z threw a service engine soon light and yep it the fuel sensor throwing a code. My fuel gage has been acting up for a time and not very accurate. It flashes with no miles left and there is still 3 gallons of gas in it. Heading to dealer this Saturday and will post up what was done.

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ufoz8mycow

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?