Re: Fuel Sensor and Gage

CX500 & CX650 Turbo Forum

Fuel Sensor and Gage

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Turboaddict 07-15-2008, 8:50 PM
I tried a few searches but have come up empty... My Turbo, Fuel gage will show full when the tank is full, but after a burn a gallon or so it jsut drops to empty. Anyone seen this and fixed it?
 

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CX500TC 22K miles
"Got Boost?"

Re: Fuel Sensor and Gage

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George in Indiana 07-15-2008, 10:05 PM
You need to pull the sending unit from the tank and then clean the coil and sweeper tab. You may need to gently bend the sweeper tab a bit for good contact against the coil.

If that doesn't cure the problem, your float may have lost buoyancy. That one drove me crazy on the 500T. A full tank showed about 1/8. Pulled the sending unit and worked great while moving it manually. Put the float/arm in a bucket of water and it floated strongly at the top. Reinstalled with a full tank of gas and it registers almost empty.
Eventually I removed the plastic float from the arm and dropped in a bucket of gas...it sank about halfway down and just sorta hovered there!

Floats not sold separately from Honda and the sending unit is no longer available. I bought a similar size carburetor float from the performace aisle at Autozone. It was the metal type with tabs on it. The tabs fit the arm perfect but I had to use the spring out of a ball point pen between the tab and retaining clip to hold the float in place....at least I think that's what I did, it's been many years.
Gauge has worked perfect ever since. I saved the float number from the package but unfortunately it got lost somewhere over the years.

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CX500 TURBO
CX650 TURBO
'86 Honda Elite 150 Deluxe
'04 GSX1300R Hayabusa

Re: Fuel Sensor and Gage

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CXTURBOBOOST 07-16-2008, 4:40 AM
What George said......

Pete

Re: Fuel Sensor and Gage

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Turboaddict 07-21-2008, 6:58 PM
Thanks guys, I'll give these steps a try and report back when I figure out what the root cause is.

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CX500TC 22K miles
"Got Boost?"