Odd Issue

[sideshowBob]

I have checked all of the out of tank fuel pump electrical connections and they seem fine.

Dave from Hurricane had some suggestions for trouble shooting as well.
If it quits again:
- check the fuel pressure gage as if the pump was running there would be residual fuel pressure
- does the gage go dead too?
- he thought the pump would blow a fuse before it triggered a relay
- could be a crank sensor and not throw a code

All good ideas thanks everyone for passing on your thoughts.

 

[sideshowBob]

I put 3 gallons of fresh 91 Octane in the sled today and rode it for about an hour and had no issues. I even tried to get it into high temp limp mode but could not get it to do it as the BOP Rad kept it just under limp mode even sitting idling excessively.
I guess I will just ride it for now as long as someone is with me for a possible tow and see if it repeats.
??????

 

[74Nitro]

I have a customer with the same sled as mine doing this also. Slow up for a road crossing, for example, and dies. Starts right back up.
Doesn't do it very often, just sort of random.

 

[fatchance]

I also have found the electrical plugs to not have support for the wire coming out of the plugs into the wire loom.
A good sturdy piece of shrink wrap on the harness onto the connector would help...
The wires will bounce around and spread open the terminals over time.
I have had this cause issues.
Loose connections will also cause plugs to melt from sparks and heat.

Tim i think the stock 2 pin plug is fine for the stock pump, but becomes an issue for the bigger pump pulling more amps.

 

[sideshowBob]

You drained your fuel and put fresh fuel in and problem solved. Maybe that's your answer. Did you fuel up at a sketchy location?

After I drained the fuel from the sled I kept it off to the side in a separate fuel container. After the gas had sat all day I pulled some fuel from the bottom of the jerry can into a clear 1 liter glass jar and let it sit over night....well...sure enough today, when I checked it, there was a noticeable amount of water in the bottom of the jar.
My sled is in and out of the warm shop all winter and has been for years without me ever draining the tank completely. We know our sleds won't burn water so maybe I got lucky and water in the fuel was the issue...I guess time will tell.
We are getting snow again right now so I will be riding again this week and will provide an update.

 

[Turboflash]

After I drained the fuel from the sled I kept it off to the side in a separate fuel container. After the gas had sat all day I pulled some fuel from the bottom of the jerry can into a clear 1 liter glass jar and let it sit over night....well...sure enough today, when I checked it, there was a noticeable amount of water in the bottom of the jar.
My sled is in and out of the warm shop all winter and has been for years without me ever draining the tank completely. We know our sleds won't burn water so maybe I got lucky and water in the fuel was the issue...I guess time will tell.
We are getting snow again right now so I will be riding again this week and will provide an update.

Nope - they don't like water in the gas! Hope that was it.

 

[74Nitro]

After I drained the fuel from the sled I kept it off to the side in a separate fuel container. After the gas had sat all day I pulled some fuel from the bottom of the jerry can into a clear 1 liter glass jar and let it sit over night....well...sure enough today, when I checked it, there was a noticeable amount of water in the bottom of the jar.
My sled is in and out of the warm shop all winter and has been for years without me ever draining the tank completely. We know our sleds won't burn water so maybe I got lucky and water in the fuel was the issue...I guess time will tell.
We are getting snow again right now so I will be riding again this week and will provide an update.

What sort of quantity here? Half liter?

 

[sideshowBob]

What sort of quantity here? Half liter?

No where near half the jar....maybe 3 oz or so of water in the 1 liter sample. It would indicate that there could have been a significant volume of water in the 5 gallons of fuel remaining in the tank.

 

[74Nitro]

I meant how much you think in the tank.

 

[sideshowBob]

I meant how much you think in the tank.

I am guessing but I would say there was 1/2 liter plus of water in the 4-5 gallons left in the tank.

 

[Turboflash]

Water sinks in gas. When sled is sitting still, water sank to the bottom of tank right where the fuel pump pickups are.

 

[fatchance]

Actually surprised there's no water separator with the potential for so much condensation in the tanks. One could easily plumb one in if it was an ongoing issue.

 

[Turboflash]

I am guessing but I would say there was 1/2 liter plus of water in the 4-5 gallons left in the tank.

Non-ethanol gas I presume? IF non-ethanol, one very distinct advantage (among several) is ethanol absorbs/bonds to water (H2O) so if one gets water in tank (condensation, direct from pump, etc) the ethanol absorbs it and dries it out and sends it to cylinder to be burned normally. Non-ethanol gas will not do this. Moisture will stay separated and settle to bottom of tank. Additionally, ethanol cools intake charge, suppresses detonation, and lowers combustion temperatures. All good things in a high performance turbocharged engine.

 

[sideshowBob]

I am still not convinced the issue was the fuel but I am hoping that was it. We just got 6" of fresh snow and we have a real good base on our trails still so I will get a couple good rides in this week and should know if stalling is cured or not after that.

 

[74Nitro]

It may be, but I have to question why it only stalls when slowing up to stop.
And no erratic running otherwise.