Fuel pressure low? 2011 800 - Polaris ATV Forum
ATV Repair and Maintenance Having problems? Doing a rebuild? All Repair/Maintenance Discussions here.

 
LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 12-20-2015, 06:30 PM Thread Starter
Junior Member
 
Rugb's Avatar
 
Join Date: Oct 2015
Location: Iowa
Posts: 7
Fuel pressure low? 2011 800

Hey guys
Just want to ask a question about this 2011 Sportsman 800 EFI that I am trying to figure out. Starts only with a lot of cranking cold. Or a squirt of gas in the intake it fires right up. No codes. So I am checking fuel pressure and the manual says 39 plus or minus 3. Doing this turning the key on and off several times it will only pump up to 29 pounds. Now if I run it the pressure will come up to 39. New battery,runs fine when it gets warmed up, not real smooth idling until it is warming up, but runs and has good power when it's warmed up in a few minutes. What do you think? Is this normal for the pressure to be this way? And/or what else could make it to be so hard starting?
PS. New plugs good spark, fuel pressure holds for several hours after its shut off checked the resistance at the temp sensor and that seems right 3.1K ohms at about 50 degrees
Thanks
Rugb is offline  
Sponsored Links
Advertisement
 
post #2 of 2 (permalink) Old 12-20-2015, 08:39 PM
Premium Member
 
bp405's Avatar
 
Join Date: Sep 2011
Location: New York
Posts: 6,991
If the pressure holds over time then it sounds like the pump isn't building up to the 39lbs fast enough to start the machine properly. I would start with the pump. It doesn't sound like an injector nor does it sound like the filter which is a sock in the tank on the pick up.

2011 Sportsman® 800 EFI
GURU front brush guard
GURU rear brush guard
Polaris front lock n ride cargo box
Polaris rear rack extender
Warn RT 3.0 winch w/amsteel synthetic line
Viper aluminum haus fairlead
Polaris front spring adjusters
Ricochet a-arm guards
Ricochet full frame skid plate
ITP T-7 beadlock 14" w/OMF inner rim guards
Maxxis big horn 2.0 26x9 front
Maxxis big horn 2.0 26x11 rear
QSC clutch kit
EPI HD springs front n rear
ODI rogue 130mm grips
Ultraseal commercial grade tire sealant (front)
Highlifter tire sealant (rear)
CTEK 3300 battery maintainer
added 7 zerks
beefed up wiring harness
OGIO rear bag
ROTOPAX 1gal. + 2gal. gasoline can
Jccapri bushing kit
Kolpin Over Fenders
Rigid Industries E-Series 10" flood
Walker Evans struts
NGK Iridium's (2,500 miles on Champion's and they looked great!)
Odyssey Extreme battery PC545

2018 Sportsman® 570-T
2019 Aluma® A8818
2020 Outlander® 1000R XXC (on order, ETA mid-Sept)

Last edited by bp405; 12-20-2015 at 08:50 PM.
bp405 is offline  
Reply

  Lower Navigation
Go Back   Polaris ATV Forum > Polaris ATV Technical Discussions > ATV Repair and Maintenance

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Polaris ATV Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome