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Winder cuts out

Finally got to the bottom of my issue. After checking everything that was suggested here (thanks to all who offered input and help) I ended up putting a piece of clear fuel line from the fitting on top of the fuel pump and ran it back into the filler neck so I could cycle the pump and watch. First time I turned the key on I got a solid stream of clear fuel through the line. Cycled the key off and back on and got quite a few bubbles and a not so solid stream. Each time I would cycle the key it got worse.

I did some digging and found out that I should be seeing 43.5 lbs with the key on, but not running. I should also see approximately 38 lbs at idle. Installed a fuel pressure gauge in-line and got 43.5 with the key on and initially got 38 at idle. After a couple of minutes warming up, the fuel pressure started to fluctuate between 30 and 38 lbs at idle. When throttle was added the pressure would drop down to 10 lbs, engine would stall and backfire, before climbing back up again. I could repeat this continually. It was not an intermittent problem like some of you are having. It has done this since the first ride of the season.

I ordered a new complete fuel pump assembly as well as new pickups, so everything in the tank is new. Installed the parts last night and saw 44 lbs key on and 40 lbs constant at idle. Throttling up showed a continuous 40 lbs fuel pressure and strong pull with no burble or backfire.

This may be a one off issue as I don't recall anyone else having fuel pump problems. Thinking about the cause, I might attribute it to ethanol in the fuel. Even though I always run premium, you can never be sure that the fuel your buying doesn't have some amount of ethanol in it. Sled worked great last season and only developed the problem after summer storage so possibly seals swelling in the pump or some form of gelling or crud causing it to slow down as it got hot. Not sure, but very happy to have the problem rectified.

I just thought I would post this in case it helps someone having similar issues. Thanks again to all who offered assistance. Much appreciated!
 

Another Phase said:
Finally got to the bottom of my issue. After checking everything that was suggested here (thanks to all who offered input and help) I ended up putting a piece of clear fuel line from the fitting on top of the fuel pump and ran it back into the filler neck so I could cycle the pump and watch. First time I turned the key on I got a solid stream of clear fuel through the line. Cycled the key off and back on and got quite a few bubbles and a not so solid stream. Each time I would cycle the key it got worse.

I did some digging and found out that I should be seeing 43.5 lbs with the key on, but not running. I should also see approximately 38 lbs at idle. Installed a fuel pressure gauge in-line and got 43.5 with the key on and initially got 38 at idle. After a couple of minutes warming up, the fuel pressure started to fluctuate between 30 and 38 lbs at idle. When throttle was added the pressure would drop down to 10 lbs, engine would stall and backfire, before climbing back up again. I could repeat this continually. It was not an intermittent problem like some of you are having. It has done this since the first ride of the season.

I ordered a new complete fuel pump assembly as well as new pickups, so everything in the tank is new. Installed the parts last night and saw 44 lbs key on and 40 lbs constant at idle. Throttling up showed a continuous 40 lbs fuel pressure and strong pull with no burble or backfire.

This may be a one off issue as I don't recall anyone else having fuel pump problems. Thinking about the cause, I might attribute it to ethanol in the fuel. Even though I always run premium, you can never be sure that the fuel your buying doesn't have some amount of ethanol in it. Sled worked great last season and only developed the problem after summer storage so possibly seals swelling in the pump or some form of gelling or crud causing it to slow down as it got hot. Not sure, but very happy to have the problem rectified.

I just thought I would post this in case it helps someone having similar issues. Thanks again to all who offered assistance. Much appreciated!
Click to expand...

Awsome! Sounds like the pickup line was loose and sucking air.
 
Nice 2 see members doing their own diagnostics!
 
ClutchMaster said:
Awsome! Sounds like the pickup line was loose and sucking air.
Click to expand...
I thought that too so I pulled the pump out of the banana shaped housing it sits in and checked all the lines, fittings and filter pads for cracks or junk in them. Actually did it twice. Couldn't find anything so I figured it must be something internal in the pump. The longer it ran, the worse it got. I just decided to replace everything and be done with it.
Ready to ride now!
 
That is nice work, and thanks for sharing. I'll be filing the clear fuel line trick for future reference. At my age that info has a two week shelf life.
 
Another Phase said:
I thought that too so I pulled the pump out of the banana shaped housing it sits in and checked all the lines, fittings and filter pads for cracks or junk in them. Actually did it twice. Couldn't find anything so I figured it must be something internal in the pump. The longer it ran, the worse it got. I just decided to replace everything and be done with it.
Ready to ride now!
Click to expand...

hi, how many miles have you been able to put on, also how many times have you ridden your sled to very its fixed?
 
Pretty sure i ran into fuel pump issues even though i didnt test as extensively as you to diagnose. Last spring last trip of season the odd time when i went to accelerate out of a corner i would get a stumble/miss lack of power that would eventually clear out. I chocked it up to northern Ontario little gas station fuel quality at the time. When we got home pump wouldnt cycle or start the sled at all to unload from trlr. Put in new fuel pump upgrade from TD when upgrading tune to max 17 and hasnt missed a beat since. Electrical connection to pump feels kind of cheesy to me too though? Stocker is prob a 5$ pump from china i would think.
 
92F1F8A3-D6AD-4244-98CB-80B046B0CC42.jpeg


If you do the fuel pump upgrade you need to run new wires, separately fused along with dedicated heavy duty relay. The stock fuel pump connector can’t handle the extra current. This connection is next to the fuel tank and if it gets hot that could spell disaster.
 
Another Phase said:
100 miles last weekend with zero issues. Leaving now for a weekend trip.
Click to expand...
Good morning, checking in to see how your ride was this weekend? Any issues?
 
Another Phase said:
Two more days of riding with no problems. Sled is running great.
Click to expand...
Great news and the team at Pat's Motorsports was able to determine fuel was being restricted and replaced both sleds fuel pumps thank you so much for your help.
 
To recap my friend and I have 2017 SideWinder's X-TX-LE and L-TX-LE(Both Hurricane Tune Bundles and now SS Tune with updated MAP sensors) at about 7,500 miles a month ago

1. the cuts out issue started (on both sleds at the same time) but only when it was low on fuel < 1/2 tank at 1st but then would do it all the time after driving 5 miles and getting it warm
2. then when going into corners left turns we worst it would fall on its face and sometimes stall only happened when fuel below 1/2 tank really bad at 1/4 tank
 
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