PRC Polaris Ranger Club banner
1 - 15 of 15 Posts

· Registered
Joined
·
14 Posts
Discussion Starter · #1 ·
I spent hours on the forums reading all kinds of suggestions and tips to find and address the idle surge that was causing me havoc trying to get the rig in and out of gear.

Belt, bearing,tps, wiring, fuel, check valve, breather tube, air filter, etc…

I gave up and took it to a local dealer who was also perplexed and tried everything I had already tried.

on a whim the tech pulled my throttle body and it was caked with oil. He then wiped it all down, sprayed it clean and reinstalled the unit and to his surprise the surging idle stopped.

If you’re at your wits end and have done all of the above, pull your TB and check it for a coat of oil.

my rig has 1400 miles and just under 300 hours. Yes, it averages about 4.5mph.
 

· Administrator
Joined
·
8,062 Posts
"on a whim the tech pulled my throttle body and it was caked with oil. "

socal, if the throttle body was coated with oil I would be checking the compression . I would also suspect the TMAP and the air filter are also getting oiled up probably from excessive blowby the rings. That is not a lot of miles/hours but a cracked throttle body adapter, which they are known for, will allow dirt to enter the engine causing the excessive cylinder /ring wear .
 

· Administrator
Joined
·
8,062 Posts
They looked over the rest and there was nothing on the filter. The vehicle has no leaks as I did the spray test. Unit runs like a top.
Then where did all the "oil cake' come from ?
 
  • Like
Reactions: yooper265

· Registered
Joined
·
14 Posts
Discussion Starter · #7 ·
Jungleman made me paranoid that I hadn't done my due diligence on checking the throttle body adapter so I went back and emptied about half a can of carb cleaner all around the base ensuring I got behind it.

Still no idle jump, but it's super clean now.

Rowedoo, where is the PCV valve?
 

· Administrator
Joined
·
8,062 Posts
Hey guys, on a 2012 800, there is a breather that has a reed assembly on the valve cover identical to the 700's. The breathers tend to warp, especially on a 800 and let oil film trickle down the valve cover . You can purchase a billet aluminum one on EBAY to cure the exterior oil/leak.

You can clean or replace the reed assembly with one from PARTZILLA (possibly available on EBAY.).... Normally when the throttle body is getting oiled, it is from blowby from the crankcase which is being pressurized because of ' lack of ring syndrome'. When you have LORS...........normally the TB, the air box boot and the air cleaner also get oiled down . I have never seen the 'oil cake' magically stop at the throttle body but perhaps it is a mild case . See PARTZILLA parts ..There is no real 'PVC' valve,just the reed assembly (#3) under the breather cover. (#5)

I would at minimum get a compression tester from HARBOR FREIGHT and check with BOTH plugs out and WIDE OPEN THROTTLE . Engine hot..

Font Auto part Art Line art Drawing
 
  • Like
Reactions: rowedoo

· Registered
Joined
·
14 Posts
Discussion Starter · #15 ·
If there is oil in the tube it's a sign that it's sticking open .
Oil in the tube for sure. The gasket was super dry and the reed while not showing any light, appears to be super soft to the touch.

I've ordered the replacement parts.

I'll run a compression test once the parts are installed and I can warm up the unit.
 
1 - 15 of 15 Posts
Top