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Odd situation with snorkels


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I don't know what to make of this. I have an Arctic Cat 2005 automatic 500 with PVC home-made snorkels that came with the ATV from the previous owner. I finally decided to remove them as I needed the room for the front cargo rack. The flexible rubber tubes where the extensions fit into are the same diameter as the extensions, and end just under the front "hood" cover. Not too different, other then length of the air intakes. Yet, the machine acts like it's not getting enough air. In other words, it lugs down under acceleration or going up hills. Throttle response is drastically reduced, unless you're moving on a level terrain, but, still noticebly less power. With the snorkels removed, the machine is totally responsive, lots of power, and no lugging up hills, actually can accelerate.

What's the deal here? Does the carb need to be adjusted? With the snorkels off, am I getting too much air or not enough? I would think not enough air. Can anyone help with this?

Larry

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I need the rack space too, and the streams here in Panama are not very deep, so I didn't need the snorkels. I did find a half dozen jets in the package left with me by the former owner, so I suspect he did change the jets. I checked into trying to put the original air filter back in, but whoa, you have to take the whole rack, bumper, winch, and plastic off to do that. So no way.

Now...I figured out the perfect solution. I re-routed the snorkels, under the plastic shroud, next to the headlights. Perfect. They're not in the way, still high enough should I encounter 3 feet of water (not going to happen), and it runs superbly. Even can accelerate going up steep hills. I feel like it can leap tall buildings too.

Thanks for your input, I learned something too about jets.

Now, I have something else...I noticed it a couple of days ago. There is an engine noise I didn't hear before. While the engine is running there is a "ting, ting, ting" sound, almost like a lifter or tappet, but higher pitched. Anyone have any idea?

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I found the source of the "ting, ting, ting". It's the fuel pump. It just started doing that after I blew "lung pressure" air through the 3 lines connected to the fuel pump. However, I did not blow air into the fuel pump. What's up with that? Is this pump dying? I'd hate to be half way up a hill when it did.

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