Hello everyone!
First time on the Polaris atv forum. I wanted to inquire from fellow owners on a solution to a ongoing problem I'm having with my 2007 Polaris Sportsman 500 HO that has stumped me.
A few weeks ago out of nowhere my atv started idling funny. So I checked the tachometer and it showed it fluctuating from 1290 RPMs down to 900 and back. If I pressed the throttle however it had zero issues and ran perfect at full power. However as soon as I let off the throttle and go back to idle it begins running rough and even occasionally stalling.
Now I've done a fair amount of research on the issue, so I did the logical thing and started troubleshooting possible problems. Here's a list of what I've ruled out so far:
- Replaced IAC harness with new ModQuad harness (old harness and wires were chewed up)
-Raplaced IAC sensor with new one
- Replaced Fuel filter
- New UNI air filter
-Cleaned T-MAP sensor
-Checked fuel pump (working)
- Checked spacing on throttle (in spec)
-New Iridium plug
As of now I've replaced everything I could think of that might be the culprit and yet I'm still having idling issues. I noticed that when it starts up the first few minutes it runs perfect no idling issues whatsoever. However after the bikes fully warmed up and running for awhile it starts stuttering and the idle goes back to being erratic. What else could be contributing to this issue? I'm out of ideas unless the t-map sensor is bad? I open to any suggestions!
Thanks!
Sent from my iPhone using Tapatalk
First time on the Polaris atv forum. I wanted to inquire from fellow owners on a solution to a ongoing problem I'm having with my 2007 Polaris Sportsman 500 HO that has stumped me.
A few weeks ago out of nowhere my atv started idling funny. So I checked the tachometer and it showed it fluctuating from 1290 RPMs down to 900 and back. If I pressed the throttle however it had zero issues and ran perfect at full power. However as soon as I let off the throttle and go back to idle it begins running rough and even occasionally stalling.
Now I've done a fair amount of research on the issue, so I did the logical thing and started troubleshooting possible problems. Here's a list of what I've ruled out so far:
- Replaced IAC harness with new ModQuad harness (old harness and wires were chewed up)
-Raplaced IAC sensor with new one
- Replaced Fuel filter
- New UNI air filter
-Cleaned T-MAP sensor
-Checked fuel pump (working)
- Checked spacing on throttle (in spec)
-New Iridium plug
As of now I've replaced everything I could think of that might be the culprit and yet I'm still having idling issues. I noticed that when it starts up the first few minutes it runs perfect no idling issues whatsoever. However after the bikes fully warmed up and running for awhile it starts stuttering and the idle goes back to being erratic. What else could be contributing to this issue? I'm out of ideas unless the t-map sensor is bad? I open to any suggestions!
Thanks!
Sent from my iPhone using Tapatalk