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Old 01-03-2017, 09:12 PM   #29
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Originally Posted by Old Radios View Post
Ethanol gas is crap. Thank the corn growers lobby. There's no gas shortage anymore. It's not necessary. I only use No-ethanol gas in everything but the cars and RV. Fortunate to have a station just down the road that sells it. RV I add a couple of bottles of Sta-Bil to the full tank before storing it for the winter anyway just in case there's any condensation.
I agree, but I live near El Paso Tx, and there are NO Ethanol free gas stations.

But the point to OP is Ethanol is NOT causing his problems, millions of cars/RV etc. are running on Ethanol.

Once again, I agree that Ethanol is crap.
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Old 01-03-2017, 10:07 PM   #30
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Originally Posted by Unplanned View Post
The stumble may be caused by poor fuel. The alcohol in the gas can separate if any amount of water gets into it. ...
I agree with 'unplanned'. The ethanol in the fuel can absorb moisture(water) from the air. Since you live in a somewhat humid region, over time more & more moisture can be absorbed and cause separation under varying temperature conditions. It does take time to absorb the water so fresh gas won't have the issue but older gas could. Here's an article that explains the process in more detail:

Tech Article: The Ethanol Issue

...and a video:

Now, it could also be related to modern FI sensors, but I'm more familiar with carb driven cars and aircraft engines where ethanol issues have been warned about for decades.
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Old 01-04-2017, 01:08 AM   #31
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How does the generator work when first coming out of storage? It is drawing on the same tank/fuel? Seems weird that after you fillup it works fine for the rest of the trip. How low do you let it go before filling up again?
Unless someone is putting water in your tank while in storage? do you have a locking gas cap, get one.
There was a post some where about the potable water leaking down into the gas fill hole. They stated when they filled the potable water tank, due to the way the overflow line was run, it would siphon water out and run down the side into the gas tank fill area. (something like that, I believe)
It's just a thought???????
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Old 01-04-2017, 08:58 AM   #32
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Here is something off the wall. The next time it starts to stumble, pull off the road and loosen the gas cap and the re-tighten it. If that fixes the stumble, your gas cap isn't venting properly. I had that issue with a car once. I replaced the gas cap, and never had that problem again. As I said, "Off the Wall".
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Old 01-04-2017, 11:05 AM   #33
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Originally Posted by BPoland View Post
Here is something off the wall. The next time it starts to stumble, pull off the road and loosen the gas cap and the re-tighten it. If that fixes the stumble, your gas cap isn't venting properly. I had that issue with a car once. I replaced the gas cap, and never had that problem again. As I said, "Off the Wall".
Good thought but I believe the current caps are unvented due to the evaporative emission system. I think they vent internally to a cannister and a purge valve that allows vapors into the engine to be burned. I would be looking more toward a problem with the cannister - cracked, or loaded with fuel, or the purge system - sticky or contaminated purge valve, leaking hoses etc.
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