Polaris ATV Forum banner

efi

  1. Sportsman 570 cold start issues

    Polaris Sportsman 570
    I have a sportsman 570 and when I attempt to start it in the cold it will start and raise to 950-1100 rpm than stalls. You try it again and the same thing for ten more tries and if you give it throttle for 5seconds it runs fine. Some times it will randomly start fine in one of the cranking...
  2. 2004 Sportsman 700 EFI

    ATV Repair and Maintenance
    Within the last month my bike has died at idle. It doesn't matter if its as soon as I start the bike or after I've been riding it for an hour. It takes off as it should and seems to ride fine under throttle at all positions except idle. It also makes a "puff" sound before dying almost like a...
  3. MAP Sensor Wiring 2008 Sportsman Touring 500 EFI

    ATV Repair and Maintenance
    Greetings, Easiest way to ask question: On the MAP Sensor pigtail plug, what color is in the middle? Detailed way to ask: Two of three wires (orange and purple) on the MAP sensor pigtail have corroded and broken off the pins of the connector. The yellow wire is in tact. I need to know what...
  4. 110 EFI Hard start/flooding

    Polaris Outlaw
    Hello all, My son's 2017 110 EFI started to become harder and harder to start. Once started seems to run fine for the most part. It seems to be flooding out at start up as you can smell gas heavily at the exhaust. Would a dirty injector cause this issue if it were stuck open? Has good spark...
  5. 05 Sportsman 700 EFI--Rough Idle

    ATV Repair and Maintenance
    Hey guys, new to the forum and a new Polaris owner. I just bought this 05 Sportsman 700 EFI. I'm having some issues with the idle running very rough. It constantly backfires from the air intake. Sounds almost like popcorn. Any help would be greatly appreciated. Currently I have a can of Sea Foam...
  6. 2006 Sportman 500 EFI Issues

    Polaris Sportsman
    A few days ago I got a steal on my second Polaris, a 06 500 EFI with just over 2500 miles, it was only $1000. The first day it had a few issues but was overall great. The next day it would start and idle nicely, but as soon as you touch the throttle it dies. I pulled the plug and it is soaked in...
  7. Handyman Special

    ATV Repair and Maintenance
    HI All, As mentioned in the new member post I bought a used 2006 sportsman 500 EFI. Bought it knowing of issues it had but the price was right so I figured why not. Last time I worked on a machine was a 98 xplorer 2 stroke. so I have a few questions, my thoughts and followup. Anything you can...
  8. 2006 Polaris Sportsman 500 EFI H.O not running!

    Polaris Sportsman
    Hey guys. I have a 2006 Polaris Sportsman that have been fighting for two years now. I have had a lot of issues with this ATV and do not know what else to do. I have always had an issue with getting it to run for more then a couple days :motz: I have just replaced the t-bap as I read this is...
  9. 08 500efi No Start

    Polaris Sportsman
    battery is good, will crank just not fire. tired starting fluid and nothing. ran perfect last week. took spark plug out and sparked first crank then nothing. every time the key is shut off then back on it will spark once. then nothing. any ideas or tests?
  10. 05 sportsman 700 efi backfire and bogging down

    ATV Repair and Maintenance
    Need help I have a 05 sportsman 700 efi, it bogs down at immediate throttle and actually backfires into the intake, idle runs ok need help asap!!!
  11. Need help no power and backfire in intake

    ATV Repair and Maintenance
    Need help I have a 05 Polaris sportsman 700 efi, it has no power and just bogs down at throttle and actually backfires into the intake need help asap!!! I have video I'll try to post to show details
  12. 07 Sportsman Electrical Power Problem

    Polaris Sportsman
    I'm new to your forum but need some help... please I have a 2007 Sportsman 500 EFI and there isn't any power at all. I've replaced the battery, starter solenoid, since there are any fuses I've replaced the Power Distro Module and kill switch. I've checked the continuity at each of the grounds...
  13. 2008 Sportsman 500 EFI shuts down while driving

    ATV Repair and Maintenance
    Hey guys, how ya doin? So my Sportsman has been having this problem for the past few months and i just have the time to fix it now. So i start it up, it starts fine. I drive it roughly 5-10 feet and all power goes dead on the quad. i turn the key back off and on and i still have no power. I have...
  14. 2009 550 XP EFI Doesn't Want to Start

    Polaris XP
    My XP doesn't want to start, although after about 10 minutes of cranking and giving it some throttle it will eventually start, run really rough until it warms up, and then once warm will only restart if you give it a bit of throttle. I didn't have this problem until I put it on a trailer and...
  15. HELP PLEASE. 850 problem

    ATV General Discussion
    I bought a 2012 Sportsman 850 XP off craigslist. Guy said there was nothing wrong with it. When I got it I noticed it would lag a lot when i pressed in the throttle. Guy said its been sitting and probably just needs to be rode. I took his word for it. It still continues to lag very bad when i...
  16. 2005 800 EFI Dies on incline / decline

    ATV Repair and Maintenance
    Hello all, I'm new to the forum as a member, but I have been using it for a few weeks after I bought my used '05 800 EFI. I've been having a few issues with it. Luckily, I was able to fix the overheating by burping the cooling system. The biggest and MOST annoying problem, however, is that...
  17. 850 EFI backfires

    ATV General Discussion
    My 2011 Sportsman 850 X2 has less than 200 hrs. It has started backfiring when letting off the throttle. Besides trying a new plug where else should I look to solve the problem.
  18. best tire for 06 Sportsman 800 efi

    ATV Wheels & Tires
    Hey everyone! I'm a 17 year old rider from BC and I purchased my atv this past summer with basically stock everything other than heated grips, gun holders and the snow plow.. I was looking into upgrading the tires and wheels sometime this year for the summer time as the current ones are getting...
  19. Help Needed: 2007 Sportsman 500x2 EFI - Engine Electronics

    Polaris Sportsman
    I am pretty sure I have a problem with the EFI electronics system. The machine has 302.8 hours on it. The engine starts and runs fine until it is warmed up - approx. 15 mins. After about 15 minutes of run time, the engine looses power, runs rough, fires back thru the throttle body, backfires...
  20. 07 sportsman 500 efi need serious.help?

    ATV Repair and Maintenance
    Got ATV week ago ran fine all week with wife and I riding around. Had a few issues when I traded dirtbike for it. Pull start gone, air box tab broke so ordered new air box and recoil housing and installed. Decided to go ride by myself today. Ride a bit hard for 1/2 hour went down a big hill...
Top