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pat young

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Posted on Sunday, April 30, 2006 - 5:21 pm:   

My friend has an '80 Gillig schoolie. He said the first time he filled it, it only went up to 3/4, and then after a week gradually crept up into full (He only drove it once or twice)Now it says "full" all the time.

I'm figuring a wire is grounding, or something in the sending unit. A fuel gage should go to "empty" with no power, correcto?
Also, the gage stays "full" whether the key is on or not.
Great minds and mechanics, now is your time to come together and support the many citizens who cry out for your advice.

Thanks

patrick Young
hobbling around fresno
Cliff (Floridacracker)

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Posted on Sunday, April 30, 2006 - 7:46 pm:   

Pat,

Disconnect the wire from the sending unit(at gauge or whatevers easier), it should drop to empty.

If it does, measure resistance from sending unit and compare to spec for gauge to see if it is correct or not.

Cliff
Phil Dumpster2

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Posted on Sunday, April 30, 2006 - 11:24 pm:   

Some fuel gauges don't change reading when power is removed.

Some fuel gauges aren't designed to keep working after 26 years.

Fortunately, getting access to the gauge sending unit on a bus isn't too difficult. Mine has an access panel in the floor right above the tank. Of course, my fuel gauge reads just above empty all the time. It's also close to 26 years old.
Henry Bergman

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Posted on Monday, May 01, 2006 - 6:30 pm:   

Pat, the gage on my '74 Crown kinda acts the same way kinda. Sometimes it reads full ($great$) or sometimes empty. (not soosss $great$)

We (my brother mostly) fiddled with all the wires and even pulled out the float thinking it had a leak or something. The sender seems OK.

Right now it reads full which is good, only the problem is that I do not trust it and I use a broom handle. CROWNS FOREVER!!!!
Gary Stadler (Boogiethecat)

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Posted on Monday, May 01, 2006 - 7:35 pm:   

Hey Henry,
I was certain my gauge worked a particular way, ie since the tank is 85 gallons and when the gauge got to E I could only put 55 gallons in, I assumed the gauge was off, but it was predictable so I trusted it...

How do you think I felt when I was out in high desert last year and according to my calculations I should have had 200 miles worth of fuel left... and I ran out ! Not only out, but halfway up a stinking grade, 7000 feet altitude and about 110 degrees outside.

Silly me ! Fortunately I was towing a trailer that had some diesel in it, and I had some weird hose, a few fittings and a teensy hand pump...and so an hour later (and covered with the stinking diesel fuel) I got back on the road.

Turns out two things happened because of that..
(1) I measured the tank with a tape measure and found out it was only 60 gallons REGARDLESS that the Crown manual says it's supposed to be 85, so for THREE YEARS I had been driving on vapors, trusting that I'd get wherever I was going, but instead of the gauge being weird, it was right all along and I was stupid all along...

(2) I built an electric primer pump in, which I'd been "thinking about" for a few years. After the fact I know, but it was only by the grace of the horny toads out there that I got it running and I certainly don't want to go thru that EVER again.

Lesson: Make sure the stinking gas gauge works, calibrate it and learn to trust what it says. Until then carry extra fuel and a way to reprime your engine..
:-) hee hee

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