From the "Seafoam" Thread a while back:
Hey and glad this has been brought up.............My RTV 900, 05 vintage, has had some kind of fuel problem for a year now. Perhaps 400 to 500 hours...........
With a load, going up hill or a grade it looses power in cylinders. The hill is 15 to 20 degrees and 600 yards or so. It may begin on a simple 4 or 5 degree grade; but usually on the steeper hills. Usually, the engine needs to be very warmed up to hot and the weight of the load may be just the driver or up to perhaps 1000 pounds of feed. The road surface can be gravel or asphalt. The transmission will be in 2 wheel drive and in high with the throttle at 3/4 to max.
The problem is totally intermittent!!! One will be cruising along at max power with the throttle backed off just a hair so that the pump is doing it's full power trick. Suddenly one will lose what seems to be all of the cylinders. If you back off the throttle just right you will get back one cylinder before the engine dies, then as you nurse the throttle for a few seconds you will gain the second cylinder and then in a bit the third. As you are doing this you have moved from high to neutral so you can work the throttle without putting pressure on the situation by engaging the transmission.
This may happen 3 or 4 times in the 600 yards or so of the 15 degree hill, or it may happen just once. Rarely, the engine will just die altogether; but if you don't "play" with the throttle just right it will...........As you go up one way/direction you will crest the hill and take a left, go perhaps 100 yards, and then take another 90 degree left.......If you have been having trouble coming up that hill, as you make the first left you WILL ALWAYS...ALWAYS, have trouble on the flat there making that left and then again when you make the second left. Again, these turns are sharp but on the flat..........
When it first started doing this we changed the fuel filter and then subsequently twice more since then in the last year and a few hundred or so hours in between. Nothing visible in the filter such as water or debris..........
We then drained the tank, twice now, and dried it out by putting a fan down in the tank for a day or two. We changed the fuel line from the tank to the fuel pump and between the fuel pump and the injector pump............
What has worked the best for stopping it is LUCAS FUEL TREATMENT AND THE CETANE PRODUCTS. Lucas has worked the best for keeping it in check.
We changed suppliers twice. Have left off the fuel cap thinking that there is a vacuum being created by going up the 300 feet in elevation.
The problem is better/diminished in the winter/fall and when you have a full to 1/2 tank of fuel.......
So......Hadn't used any fuel treatment in a month or so as the problem had gone away for awhile; but slowly reemerged/came back, until now it is full blown happening most every time you go up the steep side of the hill...............So, today, I put in some Lucas, perhaps 4 oz in the half tank of fuel that is in there.........ITS GONE!!!.....now watch, it will come back full force; but for today, it was better.........
So, after reading all of this......THANKS FOR READING......I was thinking it was the fuel pump and was ready to replace that; but now with adding the Lucas and it getting better I am wondering what in the world that is fuel related that could be causing this???????
Would Sea Foam have better results than Lucas Fuel Treatment?????
What could be causing this.......????????????????
THANKS FOR READING AND THINKING ABOUT WHAT THIS COULD BE.......
Hey and glad this has been brought up.............My RTV 900, 05 vintage, has had some kind of fuel problem for a year now. Perhaps 400 to 500 hours...........
With a load, going up hill or a grade it looses power in cylinders. The hill is 15 to 20 degrees and 600 yards or so. It may begin on a simple 4 or 5 degree grade; but usually on the steeper hills. Usually, the engine needs to be very warmed up to hot and the weight of the load may be just the driver or up to perhaps 1000 pounds of feed. The road surface can be gravel or asphalt. The transmission will be in 2 wheel drive and in high with the throttle at 3/4 to max.
The problem is totally intermittent!!! One will be cruising along at max power with the throttle backed off just a hair so that the pump is doing it's full power trick. Suddenly one will lose what seems to be all of the cylinders. If you back off the throttle just right you will get back one cylinder before the engine dies, then as you nurse the throttle for a few seconds you will gain the second cylinder and then in a bit the third. As you are doing this you have moved from high to neutral so you can work the throttle without putting pressure on the situation by engaging the transmission.
This may happen 3 or 4 times in the 600 yards or so of the 15 degree hill, or it may happen just once. Rarely, the engine will just die altogether; but if you don't "play" with the throttle just right it will...........As you go up one way/direction you will crest the hill and take a left, go perhaps 100 yards, and then take another 90 degree left.......If you have been having trouble coming up that hill, as you make the first left you WILL ALWAYS...ALWAYS, have trouble on the flat there making that left and then again when you make the second left. Again, these turns are sharp but on the flat..........
When it first started doing this we changed the fuel filter and then subsequently twice more since then in the last year and a few hundred or so hours in between. Nothing visible in the filter such as water or debris..........
We then drained the tank, twice now, and dried it out by putting a fan down in the tank for a day or two. We changed the fuel line from the tank to the fuel pump and between the fuel pump and the injector pump............
What has worked the best for stopping it is LUCAS FUEL TREATMENT AND THE CETANE PRODUCTS. Lucas has worked the best for keeping it in check.
We changed suppliers twice. Have left off the fuel cap thinking that there is a vacuum being created by going up the 300 feet in elevation.
The problem is better/diminished in the winter/fall and when you have a full to 1/2 tank of fuel.......
So......Hadn't used any fuel treatment in a month or so as the problem had gone away for awhile; but slowly reemerged/came back, until now it is full blown happening most every time you go up the steep side of the hill...............So, today, I put in some Lucas, perhaps 4 oz in the half tank of fuel that is in there.........ITS GONE!!!.....now watch, it will come back full force; but for today, it was better.........
So, after reading all of this......THANKS FOR READING......I was thinking it was the fuel pump and was ready to replace that; but now with adding the Lucas and it getting better I am wondering what in the world that is fuel related that could be causing this???????
Would Sea Foam have better results than Lucas Fuel Treatment?????
What could be causing this.......????????????????
THANKS FOR READING AND THINKING ABOUT WHAT THIS COULD BE.......
Fuel Pump???
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