Maybe the filter at the carb needs to be replaced.

A Hamilto wrote on Mon, 27 June 2016 15:36

Maybe the filter at the carb needs to be replaced.

Never mind. I see you changed that.

But a clue is: "I filled it at Costco and it took 34 gals. two blocks down the road it started sputtering and tried to die when I gave it any gas."

You might have water in the tanks from that gas. Figure out a way to get as much of that gas out and put fresh gas (from someplace else) in it.

Costco moves more gas than just about anyone. I kinda doubt that they would
have contaminated fuel, but because it is at least a possibility, it should
be checked to rule it out. Gasoline dripping from the charcoal cannister
tells me that the liquid/vapor separator in the rear wheel well on the
drivers side of the coach either is not working or is overwhelmed with
liquid fuel expanding out of the tanks through the vent hoses. This should
NOT be happening. Is the exhaust pipe emitting black smoke, which might
indicate a sunk float or stuck inlet needle in the carb. Change and/or
check ONLY ONE THING AT A TIME to rule out your problem (s).
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Jun 27, 2016 2:01 PM, "A." wrote:

> A Hamilto wrote on Mon, 27 June 2016 15:36
>> Maybe the filter at the carb needs to be replaced.
> Never mind. I see you changed that.
>
> But a clue is: "I filled it at Costco and it took 34 gals. two blocks down
> the road it started sputtering and tried to die when I gave it any gas."
>
> You might have water in the tanks from that gas. Figure out a way to get
> as much of that gas out and put fresh gas (from someplace else) in it.
> --
> 73 23' Sequoia 4 Sale
> 73 23' CanyonLands Parts Unit 4 Sale
> Upper Alabama
> "Posting on the GMCnet seems to always result in a cacophony of responses
> which only tend to cloud the solution rather than move you closer to it."
> Jim Miller
>
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Not likely. Costco sells a VERY high volume of high quality gas and it is very unlikely that they have water in their tanks. I guess anything is possible though.

I don't know what the gas running out of the charcoal canister might have to do with this, but that shouldn't be happening either. That, and the ballooning of the tanks points to a venting problem of some sort.

Maybe not water, but SOMETHING in the gas.

Too much of a coincidence to be ignored.

35 gallon fill up, I would guess your tanks are full-full. You could try to drain off 10 gallons and see how it runs?

I would not consider by passing the separator as that could lead to large amounts of fuel spilling out. Bypassing the canister is another story. Several GMCers have done that. They run the hose from the vapor line on the separator down to the bogie area. This puts fuel fumes outside the motorhome. This is what it used to be for many years prior to the EPA pollution control regulations.

People who do this are ignoring the pollution control laws but if their canisters are leaking anyway it really doesn't make much, if any, difference in pollution.

I had a cracked canister a couple of years ago and replaced it with one purchased from Applied GMC for $89.95. http://www.appliedgmc.com/prod.itml/icOid/1789

Prior to its replacement I spilled quite a bit of fuel on the ground whenever I filled my tanks.

Emery Stora
77 Kingsley
Frederick, CO
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