Having Fuel Capacity Sensor Problems

[itsRICHARD]

Hey,

So since I bought my car I've been having problems with the amount of petrol left in my tank, when it shows empty and on my screen/cluster that I need to fill up, it only fills up to 65L and it's full. Sometimes only 50L and it's a full tank.

Sometimes my check fuel light comes on then after an hour or so I suddenly it shows I have half a tank.

Anyone have the same problem?

[ka86]

Common Problem. Search and you will see its a known problem as well for G35s.

Floater gets covered in varnish hence gives false readings. One way of fixing is poppinng of both yourself and use cotton buds to clean it a few times. Clean both senders. If it works then yay, if not new senders would be the way to go. I haven't heard that the gauges themeselves having a known issue.

:-)

[scotty nm35]

There are two level senders, one in each side. The car has a computer to guess the amount of fuel left from both those sensors, sometimes they get dirty but usually it is just fuel sloshing to the other side of the saddlebag tank around right hand corners.

The fuel is slowly sucked back to the pump side of the tank while driving, using vacuum generated from the return line.

[Nightcrawler]

Yep, mine was already doing it when I got the car at 48k km.

[vee35]

yep got the problem, and its next on the list to be fixed. And by fixed I mean the q-tip cleaning

[scotty nm35]

They all do it, it is normal. I wouldn't worry about it as Nissan designed it that way for a reason.

Make sure if you are pulling the pump, replace the tank orings, they are not reusable as I found out.

[Roachy94]

Just curious Richard, did it affect the fuel economy display aswell? No idea how but I had my 300gt in getting a roadworthy and after the fuel economy had dropped from the 8.5/l mark down to around 4.5/l.

[itsRICHARD]

Not too sure what you mean roachy, I've had the problem since I purchased my car as well I'm getting roughly 8.2km/L on the screen, mix driving. It all depends on how you're driving.

Getting roughly 400-450km out of 65L

[Seano350GT]

I'm also in the same boat. Last night for instance, i turned the car off at nearly exactly half a tank then turned it back on this morning and had 1/4 left lol.

[V35_Paul]

I fixed mine.

Pull your back seat off and there are 2 lids to the fuel tanks. Open both and clean contacts with Cotton Buds.

All good

[Alkatraz]

Same issue with the V36. Looks like it is something that Nissan couldn't be bothered fixing. Will be pulling my seats up tomorrow to clean the contacts, hopefully fixes the problem.

[itsRICHARD]

Alright, thought it was just me, I'll give the contacts a clean when I get my coilovers in