There’s 2 sending units, one is on the upper part of the tank and deals mainly with the upper end of the gauge. The lower unit is attached to the pump assembly and is probably the culprit with your symptoms. They work together to cover the gauge’s range. Honda doesn’t sell the lower unit separate from the assembly. If you have the Honda service manual, you should perform the troubleshooting tests for it before spending big $$$.
Thanks so much for this information. Therein lies the mixed information- 2 sending units! Yes, when I fill up the gauge moves to the full mark but as the tank empties, it stops on the 1/4 tank mark.
How many gallons does it hold when the gauge is at the 1/4 mark?
Go to the “Fuel Gauge/Low Level Indicator” subsection in the “Lights/Meters/Switches” section and perform the gauge tests first to eliminate the gauge or wiring. If the gauge passes, then move to the next section, “Fuel Level Sensor Inspection” and perform those tests. You will need an ohmmeter to measure the sending units/sensor’s resistances. If the resistances check good, then the lower sending unit’s arm is bent down too much. If you get to the part where you pull the pump assembly out of the tank, be very careful, the plastic frame and parts that it’s made of are brittle and easily broken.
Does that mean you actually ran it out of gas while the gauge was still showing 1/4 tank ?
The best thing about that eureka boy thread, is the fact that the arm can stop it’s upward movement and the wiper not be where it should be due to an improperly formed float arm. Of course, that gauge issue was no full indication with a full tank.
YA WHAT HE SAYS !! :serious: I WOULD REMOVE PUMP AND CHECK THE GAUGE WIRE AND SEE IF BENT SOMEONE MAYBE TRIED TO FISH SOMETHING OUT OR GET ALL THE "BAD" GAS OUT AT SOMETIME
I run out of gas with it on the 1/4 tank mark.
