94 octane stall

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Kenflo

Kenflo

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Ok, so I decided to fill er up with petrocan 94 octane. Shortly after, it stumbles and dies, starts up and I barely make it home. Until now I have only used 91 octane with no issues. Thought I would give the 94 a try, seems like it was a mistake? What have I done!?
 
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I have trouble with that concept. But Bad gas? It happened to me. Full tank of premium. Apparently
the fuel isn't sold often where I stopped, so it was bad in the gas station tank. It stunk, and fouled everything up. I now watch where I buy my premium fuel.
 
Bad gas? Never thought of that. I removed all that I could out of the tank, so now I'm going to refill with the 91 octane and hopefully it'll dilute the bad gas enough to get it goin again?
 
I hope it works. I siphoned out the gas and used in my lawn tractor. That was a long mowing. Up and down RPM, stuttering, etc. it wasn't my Imagination.
good luck with it.
 
You probably got a slug of water with the gas. It's in the carb now, so you'll have to dump it out. Dump it into a clean dry bowl. Then transfer it into a tall small-base drinking glass. Give it a little swirl then set it down and watch the water gather itself together in the bottom of the glass, Simply fascinating.
If the gas is clear; not red, not orange, not yellow, then it is fresh enough to use,IMO and I wouldn't suck it out. But I would be prepared for more water to come up the pipe.
Isopropyl alcohol will bond to the water, and make the molecules small enough to pass thru the main jets. Yeah you will feel it when it does this. And it will still stall at idle cuz the low-speed system goes really lean, too lean to support combustion. When you feel it stumble just slap the gas pedal a couple of times, until it moves on thru.
 
A car will run on high octane, low octane...Contaminated gasoline will cause problems though.
A car with even 9.5 compression will run on 80 octane gas but it won't run well. If it runs great on 91, running 100 will neither hurt nor help.
 
the PetroCan 94 has ethanol in it and can end up sitting in the station tank for a long time so I'm with AJ .
 
When there is a bunch of alcohol in the gas, like I have here in Connecticut, any water in the gas just gets mixed up with it. Unless this whole witch's brew of a mixture has "gone bad" (phase separation), the small amount of water mixed in just passes thru the engine unnoticed. Phase separation: Tech Article: The Ethanol Issue
 
i found a dramatic difference going to 94...pulled harder and smoother with no detonation.I did get one bad tank years ago ...like you the car would barely get up a hill without detonation.I buy from a very busy Petro Can station now and haven't had any problems yet.I never put more than half a tank in so the gas is gone in a week or two.Problems may occur if it sits in your tank for 2 or 3 months.All gas i believe in Jan 2017 was mandated to use 5% ethanol.Petro Can 94 has 10% so it's not much.
Run a post on Ethanol and you might start a war!
 
We still get 0 % ethanol in the Chevron 94 here in BC and last I checked the shell 91 was still ethanol free .
 
I went dirtbiking with a few friends several years ago and my buddy Dans bike wouldnt start... We had just ridden a few days before and his bike ran fine. The only difference was that he put 1 gallon of gas in that morning. His bike has a transperant type of desert tank and you could see the parting line between the water and the fuel !
We drained his tank and refilled it with some of my fuel.
RINGADINGDING..... BRAAAP!!
started right up!
 
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