Quantcast
Jump to content

  • Do you own an ATV? Join our Forum!

    As a member, you can post in our forums, upload your photos and videos, use and contribute to our downloads, create your own member page, add your ATV events, and even start your own ATV club to host your own club forum and gallery.  Registration is fast and you can even login with social network accounts to sync your profiles and content.

auditorguy

2005 Polaris Sportsman 800 EFI Low Idle

Recommended Posts

Hi all  My sportsman 800 starts and runs fine but the idle is too low so it won't stay running even when it is all warmed up.  I know there has to be an easy adjustment to this but I cannot find it in the owners manual.  Anyone know how to adjust?  Thanks

Share this post


Link to post
Share on other sites


I don't think its adjustable without a special tool and the question is why is it low. I would try and clean the throttle body and check the throttle cable and make sure there is no dirt hanging it up. What year is it?

Topic title changed to: 

Polaris Sportsman 800 EFI Low Idle

  • Like 1

Share this post


Link to post
Share on other sites

It is a 2005 sportsman 800 EFI

I will check the throttle cable and see if I can find any hang up.

 

Share this post


Link to post
Share on other sites

check the voltage reading of the tips sensor. if not right vehicle let will not idle properly 

Share this post


Link to post
Share on other sites

@tristan6482 Thanks for the suggestion, I changed the plugs (which was kind of a pain) and the machine still wont idle well when first started but once warmed up it stays running.  Still seems the RPMs are low but it keeps running.  

Share this post


Link to post
Share on other sites

What is the reading of  your tps sensor. I belive it should  be .95 volts.

As stated  in my last post the only adjustment to the idle is the tps sensor. And there is not much adjustment on that 

Share this post


Link to post
Share on other sites
9 hours ago, colin james said:

What is the reading of  your tps sensor. I belive it should  be .95 volts.

As stated  in my last post the only adjustment to the idle is the tps sensor. And there is not much adjustment on that 

Hey Collin thanks but I am not sure what the TPS sensor is or how to get the reading you are asking about.

Share this post


Link to post
Share on other sites
16 minutes ago, auditorguy said:

Hey Collin thanks but I am not sure what the TPS sensor is or how to get the reading you are asking about.

Throttle Position Sensor 😉

Share this post


Link to post
Share on other sites

Should be on the side of the thotte boady with 2 screws with a 3 wire electrical conection. 1 wire will be 5 volt reference , 1 will be ground  and 1 will be the signal wire that goes back to ecu. If you have a hand held multimeter you can check check the signal by back probing  and setting meter to lowest DC scale. Or if you don't feel  comfortable testing the wiring and  can get to the sensor easily, start the engine loosen the screws that hold sensor and slowly rotate sensor 1 direction rpms should drop the other they should increase. Be careful and do not force anything. 

Share this post


Link to post
Share on other sites

Happy new year. So how did you fix the idle problem? I am also having a idle issue. It will run fine but will idle for a like 15 seconds then die. It will start just fine but won't stay idling. 

Share this post


Link to post
Share on other sites

@Nam Repus Nam I changed the spark plugs and that seemed to help some.  Once it is well warmed up it will idle now.  I need to get out my multi meter and follow the suggestions to check the signal but since I have been doing ok as is I have not taken the time to do that yet.  Good luck, happy new year to you too!

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Similar Tagged Content

    • By jwline
      Friday evening went riding, rode for a good hour or so everything was fine. I went to take a short ride to the restroom (less than 100 yds away) and all of the sudden everything flickered and then just died out. Accompanying the problem I noticed the killswitch completely locked up. Once daylight hit took the killswitch apart to find it had shorted out and melted the plastic inside. Has anyone else had anything similar to this and if so what did you do to fix the situation? I have a new killswitch on the way to replace the obvious problem but was wondering could there be a bigger issue at hand. We tested with a voltage meter to make sure everything was still getting power from the battery and as far as we could tell it was.
      Any advice/info would be GREATLY appreciated.
      Thanks.
    • By bodon
      Anyone know what the fuse terminal marked UNSWITCH  does  .  Even with the key off it is causing a drain on my battery and I'm trying to figure out  what that terminal goes to.  It's a 10 amp fuse. If I pull it the "short" goes away.  Thanks in advance.
    • By Outkast7222
      Had a spark-plug break off, had to pull the head to get it extracted. Where the heck is the timing mark on the crank? Do I need to pull the stator or flywheel to find it? When I pulled the head I had the mark on the cam lined up pretty good but I cant remember if it was perfect and don't want to reassemble a tooth off and have to go back through the bear of pulling this thing back apart.
      Thanks guys!
    • By Chase Cook
      Hi I just got an Polaris sportsman 500 4x4 ATV the other day. I got it real cheap but I started to go into it because it didn't have compression so I bought a new piston and ring kit for it and installed it, but now when I try to start it all it does is shoot fire out the exhaust or the intake of the carburetor. And a timing is top dead center.;I think I can't really tell another way if it is or not. when I put it together I made sure to piston was on top and the cam lobes where facing down where are the cam sprocket is facing up. It has gas and spark. It did start a couple minutes ago but it didn't stay running and now it won't start. Do you think the valve need to be adjusted more to close better?I'm fixing to try that out and if that don't work what is the problem? Also I made sure everything was together good and right and change the oil and changed out the radiator fluid.
    • By Brian Sosebee

      I just rebuilt my 03 sportsman 400. Put everything back together added oil per the manual. Pinched off the oil tank vent line 2" away ran for 45 seconds then cut it off. Check oil level and it was still way high so I wasn't confident that it primed so I did it again. Checked again and it's the same. Remove the oil filter and it is dry. I did the procedure again and the same results.

      I'm worried to keep trying this as the only oil in the engine is what I used to lubricate the parts when reassembling the piston. The crankcase was drained as well.
      I Removed the oil tank and checked all the lines for obstructions and the screen filter and the vent hose and everything is clear. I even pulled a small vacuum on the oil tank while it was pulled off to make sure there were no leaks. The dipstick cap was on tight so I'm not sure why this thing is not priming.

      Anyone have any suggestions. I thought about pre-priming the oil lines from the oil tank to the crankcase to hopefully help the system prime. I'd like to be able to add some oil to the crankcase to so I wouldn't feel so bad about running the engine for another 60 seconds without oil. I dropped just a little bit of oil in the spark plug hole to help condition the sleeve right now.

      What do I do? Anyone had or heard of an oil pump failure on these. Btw oil pump is working fine before I did the top-end rebuild and the oil pump was not touched.

      Please help!!! Thanks all for any and all help.
  • Similar Topics

    • By billyz57
      New to Quadcrazy, Has any Yamaha owners had similar issue?
      1987 Yamaha YFM 350 Starts on Pull, but just spins on starter, and won't start.
    • By Chrism
      Hi all, new to this forum so thanks in advance for the help.

      I have recently brought a 2013 power steering fuel injected foreman 500.

      It has a crack in the front casing and was running rough. I have since replaced the front engine casing and this has made no difference to the engine performance.

      It starts and idles but bogs down and starts to die once throttle is applied.

      It maybe be but it also sounds very load.

      I have uploaded a video link of it.
       
       
       
    • By technofarmer
      Hey there, i have recently put a new drive belt on my 11 Polaris Sportsman 500 H.O.    It has 44 miles since putting the new belt on and should be nearly broken in as i hear it takes 50 miles to do so?  Anyhow it has had a little trouble with slipping since i put the new one on a few months ago. Now whenver i go down a hill the belt seems to be getting caught in one clutch if not both and then it has to run a high rpm just to go a low speed.  Today it did that again going down hill, i stopped, put it in neutral and when going back up the hill i had to turn it off, put it in neutral, let it roll back down the hill a little, then restart it, low range and it was slipping but thankfully i was able to make it up the hill. 
       
       So what might the problem be? Is this a need for another new belt? New clutches and belt? Or just get something else? BTW the brand new belt i put on it, is a factory one, an exact replacement for the original.   

    • By Ajmboy
      View File 2009 Polaris Ranger 700 4X4 Crew / 6X6 Service Manual
      2009 Polaris Ranger 700 4X4 Crew / 6X6 Service Manual
      Submitter Ajmboy Submitted 10/31/2020 Category Polaris UTV  
    • By DMC66
      I need a repair manual for a 2004 and a 2005 sportsman 90 and I found a 2006 manual for cheap money. Is it worth getting and will it cover everything for the 04 and 05
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...