When this happens....have you opened the fuel cap to see if perhaps the fuel is hot/boiling ?

Yamaha had this issue with the Grizzly 700 awhile back.

Also, does it occur at any/all elevations ?

I don’t believe it to be quality of fuel. I think you've ruled that out.

Just a thought.....  🤔

No pressure in the tank. We initially thought maybe 1/2 tank of fuel was creating the issue, but we topped off in Hildale/Colorado City and the issue surfaced just a few miles down the trail.

As for elevation, we've been low elevation the last 6 days.. all in/around Hurricane.

These issues started for both machines around 1500 miles on the odometer. We've run high elevation earlier this summer without issue. Maybe a low elevation issue?  

Rich wrote on 01/26/19 at 13:24:38:


We both cleaned and replaced air filters. I had a brand new air filter upon arrival and Rut replaced his on Day 1.

I actually meant the tube to allow air into the gas tank as fuel leaves and the fuel filter inside the tank on the pump for the fuel injection.  Lost power on my Raptor at the dunes once cause the filter would clog up but when I shut the machine off the dirt in the tank would fall off the filter.  It would then start to build up again as I ran the quad hard.

Hey Les, how you doing. You helped me do my pinion nut out in Wendover.

I installed the Quantum pump in my 1000 last week, I haven't been able to take it out and see if it acts up. The strange thing with this issue is that it has only happened in southern Utah. We have rode hundreds of miles in northern and central Utah, in between trips to southern Utah, with no issues.

I didn't check the pressures. I didn't notice a test port when I had it tore down.

Mike

A huge shout-out to Rut for offering, then executing on replacing the factory defective fuel pump in my new 2018 Sportsman XP1000. I think Rut and I confirmed that after ~1200 miles, these factory pumps crap the bed and likely overheat causing the stalling effect.

And, going above and beyond, Rut even rewired some of my dealers apparent shoddy work on my street legal lights and even fixed *MY* shoddy work on my Rotopax mount!  

Kudos and a HUGE thank you to my friend Mike (Rut) for all this super work on my behalf!

The Grizzly issue has been discussed quite a bit in prior threads. Pretty scary...

Here's a really old thread (one of many) on the subject:

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I have a concern that seems to be related to this thread.
2015 XP1000 2 seater, a bit short of 7000 miles.  I have been on 5-6 rides since winter.  The unit started surging on me, getting worse as the ride progressed.  the last ride the surging started at about 35 miles into the ride.
I put sea foam through the tank - no change.
The dealer in Ogden has replaced the fuel pump and completely rebuilt a clutch. Put on a new belt. $1200  Wanted to return it to me as completed.  As I drove it home the surging began again and got worse as I turned around and headed back to the dealer.  The engine quit when I stopped without action on my part.  I took the tech for a ride and could barely keep the engine running when I slowed or stopped,
They say they have checked everything that might be a factor and all is in specs.  the engine is fine.
They have no idea of what is happening.  They will be on it Monday.
Any suggestions?  Any oddball ideas of what might be happening?
Help - I am headed for a week long trip next Tuesday with my buddies and surely do not want to have only the 800 for a ride.
The idea of cleaning the tank was mentioned.  Did that solve the problem for you?
George

Put a pressure gauge on the fuel system, check the pressure, it should be near 60 psi. The easiest place it right at the tank where the fuel line goes back to the engine. If the pressure is low and I suspect it will be, replace the pump with a Quantum pump. You don't need to change the complete module, just the pump in the module for around $80.00.
Replacement pump kit: HFP-396-28705 $79.98  
Replacement fuel module: HFP-A3964-28705   $169.98
This wrench will make the job much easier, Polaris Fuel Pump Nut Wrench, Ref. Oem Pu-50326, the cost is around $80.00 and the price is locked in by Polaris as it is a Polaris Tool. I have changed several without this wrench, the cost is well worth the cost. I wish I had bit the bullet and bought one sooner.

Hope this information helps someone.

Pullerguy

BruteForce wrote on 05/23/21 at 07:04:48:


The old fuel pump that has just been replaced is the original issue and has almost 7000 miles on it.
The new one is OEM and may also have the problems you indicated.  It seems, though, that even a bad pump ought to work for a few minutes.  So......??

A quick pressure will point to or eliminate the pump.


Check the throttle position  sensor.

Maybe a long shot but check all the grounds and clean them, the electronics are very picky about voltage.

Les