Joined
·
8 Posts
Hey guys, I have a 2015 polaris sportsman 850 and it just recently started idling rough and stalling sometimes but only in park, and neutral. Runs amazing in high, low, and reverse. Any ideas?
2015 polaris sportsman 850 idles problem
1 - 17 of 17 Posts
How hard does it start? If it starts harder than it did when you first got it there is a good chance you need you the valves adjusted. If they are way out, I would recommend pulling the head and going through it paying close attention to the valves that were loose.
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
Joined
·
8 Posts
Idk man it starts up just like the first day I bought it, just wants to stall in neutral and park.
Joined
·
16,288 Posts
Yes it does. Its under the air box on the front of the engine. That could very well be his problem.
IDLE AIR CONTROL VALVE (IAC) Operation Overview The Idle Air Control (IAC) is used to stabilize the idle quality of the engine at cold start-up and after warm-up operations. Mounted in front of the engine, the IAC contains 1 stepper motor which receives varying voltage signal pulses from the ECU. These pulses determine the IAC plunger setting, thereby controlling the amount of air bypassing the closed throttle body for idle control. If the IAC is disconnected or inoperative, it will remain at it’s last operated position. IAC Test The IAC is a non-serviceable item. If it is faulty, it must be replaced. It can be ‘bench tested’ using the following method: Set your meter to read Ohms. Check the resistance values at each of the following pin locations of the IAC. If any of the readings are out of specification, replace the IAC. IAC Replacement 1. Remove the seat, upper side panels and front cab (see Chapter 9). 2. Remove the (2) screws retaining the airbox to the frame. 3. Disconnect the main vehicle harness from the ECU and ignition coil located on either side of the airbox. 4. Disconnect the shift linkage from the shift lever. 5. Remove the spark plug wires 6. Remove the breather hose from the valve cover breather. 7. Loosen the clamp and remove the intake boot from the intake plenum. 8. Remove the airbox assembly from the vehicle. IAC Resistance Readings Pins Resistance Pins Resistance 1 - 2 30 ± 1.2 4 - 5 30 ± 1.2 2 - 3 30 ± 1.2 5 - 6 30 ± 1.2 1 - 3 60 ± 2.4 4 - 6 60 ± 2.4
Joined
·
1 Posts
Hi, I have one with the same issue. Did you solve yours? What caused the issue. Thanks
Your question has now been logged into the queue and the next available forum member will answer you shortly. You will be given more advice than you could hope for.
Joined
·
248 Posts
yes 110% check fuel pressure!!
Joined
·
1 Posts
Did you ever find the issue with your rough idle on park and neutral but not any other gear? Having the same issue and at a loss. Thanks
Joined
·
8 Posts
Tanner I replace my wiring harness, it fixed mine. I did replace every sensor, even tried another ecu.. broken wire somewhere was the problem
Joined
·
8 Posts
I fixed it by replacing the entire wiring harness.
1 - 17 of 17 Posts
