2019 Polaris AXYS Engine Surge

[RMK900Tractor]

2019 Polaris AXYS 800 is surging at startup and at low RPM in the 1/8 to 1/4 throttle position. When the sparkplug boots were removed we found a dark powdery material. I think it is being caused by electrical arching.

We did not have replacement boots available so just changed the spark plugs and added dielectric grease. This seemed to make a big improvement.

My plan is to, 1) change the boots and plugs, 2) check and adjust the throttle position sensor (If needed).

Has anybody else had this issue and what did you to to resolve?

 

[Golanda]

Low idle, Low RPM surge 19-20 800 Axys

OK,very odd problem here. I know of at least 4 other 2019-2020 800 Axys that are during this! When all of these machines got about 400 miles on them they started to surge at low rpms and have a low idle. Some of these machines are completely stock, some have just a can, two have SLP pipe. Our...

www.snowest.com

 

[BeartoothBaron]

I get that powder on my plugs too. I'd just blow it out every now and then, and maybe switch plugs back and forth occasionally so you're "burning" a different spot. And use dielectric grease, like you mentioned. Most of the wear seems to occur on the spark plug electrode, so eventually you'll just have to replace the plug. It wouldn't hurt to replace the wires too, if you think it's still not running right. If you want to get fancy, NGK has some pretty red wires (NGK 8054 part number). One last thing to check is to meter out the wires. You should see 5k-Ohm; sometimes the wire will break down internally, causing a weak spark.

 

[RMK900Tractor]

I checked the wires but they seem okay.

Anybody know if Polaris did a ECU software update to the 2019 800 map? I have not had it check since it was new in 2019 and I am wondering if a new calibration map is avaiable.

 

[slash]

SLP has plug-wire boot kits that have a good tight fit, that and DEG should fix that problem

 

[r.c.rob]

Dielectric grease on the top of spark plug only and zip tie the boot to the plug.

 

[RMK900Tractor]

I was finally able to figure out the internment low speed bogging issue. The issue was surging at start up and low speeds causing drivability issues. It turns out the cause was the injectors needed to be replaced.

Once I changed them, the sled run perfect at both idle and low speeds.

Once I got that figured out then soon after I was having problems with bogging when the exhaust valves started to open. Found out the exhaust valve cable had broke. Replaced that and now the sled runs perfect from idle to WOT.