Could it be the fuel pump? - Polaris RZR Forum - RZR Forums.net
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post #1 of 8 Old August 20th, 2019, 06:57 AM Thread Starter
 
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MIS Flag Could it be the fuel pump?

Need some help please. We are riding in Taylor Park, Co. and having trouble with our 2016 1000 XP. It runs fine for five or six hours then for no reason sputters and dies. We have ridden it here many times, no problems so l don’t think it has anything to do with the altitude. When it dies you can remove the fuel cap and pressure has built up in the tank. Wait a while it will start and run a short distance (low power) then die again. This might go on five or six times and when your ready to give up it will start and run like nothing was ever wrong.

Could it be the fuel pump is getting hot? Any help would be appreciated!

Forgot to add; I noticed speedometer is registering about twice the speed as actually going. I’m pretty sure this is a separate problem, but any help with the cause would be appreciated also.

Last edited by fishdog7; August 20th, 2019 at 07:07 AM.
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post #2 of 8 Old August 20th, 2019, 09:00 AM
 
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Re: Could it be the fuel pump?

Pressure building up when taking the cap off means the vent hose is plugged. That could cause a fuel starvation problem as the fuel is sucked out and creates a vacuum in the tank the pump can not pull against. First is to follow the fuel tank vent hose and make sure it is clean with not restrictions. Suspect you will have no more problems once the vent is cleared. It is possible the fuel pump could receive damage from fuel starvation. As it would run full bore with no fuel going through to cool the pump. This would explain why it runs great for hours before having a problem. Suspect it is not pressure you hear when removing the cap but air rushing into the tank.

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post #3 of 8 Old August 20th, 2019, 01:51 PM
 
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Re: Could it be the fuel pump?

Had same thing in Utah last year. Vent line was fine. When I got home to Michigan I replaced fuel tank because the one way valve is integrated in the tank and also replaced fuel pump. All better now. Which one was it, IDK. Any riding over 8000ft and I had the same problem as you.
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post #4 of 8 Old August 20th, 2019, 02:56 PM
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Re: Could it be the fuel pump?

Quote:
Originally Posted by fishdog7 View Post
Forgot to add; I noticed speedometer is registering about twice the speed as actually going. Iím pretty sure this is a separate problem, but any help with the cause would be appreciated also.
Did you accidentally set it to kilometers?


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post #5 of 8 Old August 20th, 2019, 04:24 PM
 
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Re: Could it be the fuel pump?

Quote:
Originally Posted by fishdog7 View Post
Need some help please. We are riding in Taylor Park, Co. and having trouble with our 2016 1000 XP. It runs fine for five or six hours then for no reason sputters and dies. We have ridden it here many times, no problems so l donít think it has anything to do with the altitude. When it dies you can remove the fuel cap and pressure has built up in the tank. Wait a while it will start and run a short distance (low power) then die again. This might go on five or six times and when your ready to give up it will start and run like nothing was ever wrong.

Could it be the fuel pump is getting hot? Any help would be appreciated!

Forgot to add; I noticed speedometer is registering about twice the speed as actually going. Iím pretty sure this is a separate problem, but any help with the cause would be appreciated also.
You are going to have to do some diagnosing. I think I would start with fuel pressure. Either way you must figure out if it's spark or fuel first. Check for spark when it won't run. Spray some carb cleaner in the intake tube with the air filter removed when it's dead to see if it's fuel. Check engine light ever come on?

If it does have pressure in the tank I doubt that has anything to do with it. Vacuum in the tank heck yes. But it should start immediately if it was vacuum and you relieved it, shouldn't have to wait.
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post #6 of 8 Old August 20th, 2019, 04:38 PM
 
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Re: Could it be the fuel pump?

Pressure in the fuel tank is a sign of something wrong. Should be no pressure in the gas tank. Think pressure, think bomb.

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post #7 of 8 Old August 21st, 2019, 07:42 AM Thread Starter
 
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MIS Flag Re: Could it be the fuel pump?

Thanks for all of your replies! Like l said l am riding at Taylor Park, Co. I ran in to Bill from American Rock Rods out here and he thought it could be a bad fuel pump, but said it would be best to get it diagnosed to be sure, which l agree. I then met some really GREAT folks from Grand Prix Motorsports out of Littleton, Co. Daryl and Rob. They contacted the dealership and are sending a fuel pump out with a friend thatís joining them today. Iím not sure it will fix my problem, but itís worth a shot. Also Bill from American Rock Rods volunteered to help put it on. Met some ďGREATĒ people out here and canít thank them enough!

Denver, you where right, in all the confusion l accidentally had switched to KM.

When l get a chance to try the new fuel pump out Iíll report back.

Thanks again!
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post #8 of 8 Old August 23rd, 2019, 07:41 AM Thread Starter
 
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MIS Flag Re: Could it be the fuel pump?

The new fuel pump solved the problem and saved the rest of our vacation. Replacing the fuel pump was no big deal the worst part was getting the ring loose that secures the pump to the tank. A pair of large channel lock pliers worked great.
Bill from American Rock Rods and the folks from Grand Prix Motorsports in Littleton, Co. where GREAT and l canít THANK them enough!
To address one of the earlier posts, l was experiencing a build up of pressure in the fuel tank when l was having issues. We had taken the vent line off and there were no restrictions. I donít know, but there must be some sort of check valve in the pump itself.

Thanks for everyoneís input! This site continues to be a great source of info and folks willing to help another out!
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