Moody fuel gauge.... ughhhh.... - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

turtle m3th · 12-08-2008, 08:25 PM

Ok, so I just picked up a 240 that had been sitting for I don't know how long, but the fuel was garbage and it needed to be removed. After removing the old fuel I replaced the pump, put new gas in and dump some fuel system cleaner in it as well. The car wouldn't read the fuel level, so I figured the unit was damaged by the old fuel, but it began to work out of nowhere after driving it for a couple of days! But the thing is it only reads full or empty... Every once in a while it will dip to the actual fuel level, but then it just goes right back to full or empty. If anyone knows what is going on here I would greatly appreciate the help. Thanks for your time zilvia!

-David

g6civcx · 12-08-2008, 10:29 PM

Again, I diagnose this problem at least once a week. Do your search.

The level, wiring, and/or gauge to be bad.

The easiest way would be to pull the pump and measure resistance on the sender as you manipulate the float level and see if the resistance changes. Check FSM or my posts for wire colours.

Go on from there.

turtle m3th · 12-10-2008, 01:07 AM

I searched, but did not find anything regarding my specific issue. Thanks for the input g6civcx! I'll be sure to test it tomorrow. Thanks for your time.

12-08-2008, 08:25 PM	#1
turtle m3th Nissanaholic! Join Date: Mar 2005 Location: San Diego Age: 38 Posts: 1,608 Trader Rating: (41) Feedback Score: 41 reviews	Moody fuel gauge.... ughhhh.... Ok, so I just picked up a 240 that had been sitting for I don't know how long, but the fuel was garbage and it needed to be removed. After removing the old fuel I replaced the pump, put new gas in and dump some fuel system cleaner in it as well. The car wouldn't read the fuel level, so I figured the unit was damaged by the old fuel, but it began to work out of nowhere after driving it for a couple of days! But the thing is it only reads full or empty... Every once in a while it will dip to the actual fuel level, but then it just goes right back to full or empty. If anyone knows what is going on here I would greatly appreciate the help. Thanks for your time zilvia! -David __________________ "cigarettes killed my father, and raped my mother!"

12-10-2008, 01:07 AM	#3
turtle m3th Nissanaholic! Join Date: Mar 2005 Location: San Diego Age: 38 Posts: 1,608 Trader Rating: (41) Feedback Score: 41 reviews	I searched, but did not find anything regarding my specific issue. Thanks for the input g6civcx! I'll be sure to test it tomorrow. Thanks for your time. __________________ "cigarettes killed my father, and raped my mother!"

12-08-2008, 10:29 PM	#2
g6civcx Post Whore! Join Date: Apr 2004 Location: Virginia, USA Posts: 5,764 Trader Rating: (5) Feedback Score: 5 reviews	Again, I diagnose this problem at least once a week. Do your search. The level, wiring, and/or gauge to be bad. The easiest way would be to pull the pump and measure resistance on the sender as you manipulate the float level and see if the resistance changes. Check FSM or my posts for wire colours. Go on from there.