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Here's my orignal post:
2011 Pro uses alot of fuel. Could it be an injector problem?
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My 2011 Pro RMK feels like it's down on power and it seems to be using quite a bit more fuel than it use to!
It has just over 1000 miles.
This is what it does:
It revs pretty quick to about 6800 then is sluggish, it dosent bog but still continues to rev to about 7500 then picks back up to 8000-8100.
Plugged the exhaust valve hose and it seemed to help the sluggishness but still uses more fuel.
I cleaned the exhaust valve hoses and ports going into the cylinders!
Confirmed that the exhaust solenoid valve is working.
Plugs do look rich!
Checked plug wires and all other wiring for wear causing it to short out. Found none.
Clutching is all good.
Replaced the pipe EGT sensor, no change?
It has the yellow injectors in it.
Could the injectors be causing this?
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Ok, this is what I found:
It was an Exhaust Valve problem! The small ports inside the Pwr Valve bodies were plugged!
This is how I found it: (After going over just about everything else!!!!) This is the quick way!
With the hood off!
Remove the Hose from the Pwr Valve side of the Solenoid. (It’s a bitch getting it off the plastic barbed fitting. Be careful not to break the fitting!) Were bypassing the solenoid for now.
To confirm that the Pwr Valves are free and working. Use compressed air at about 3 to 5lbs only
Blow into the hose. Watch the hole on the plastic caps of the Pwr Valves. You should see the end of the Pwr Valve shaft move up in to sight. Release the air pressure and they should pop back outa sight.
Ok, if they move freely then move on.
If not? Take them out and clean at this point then jump straight to the end.
OK, they moved freely.
Start the sled, let it idle. No need to put the hood back on!
Look to see if any smoke or anything comes out of the hose! There should be some smoke puffing out, especially if the sled is cold!!! Some kind of air flow for sure! If there is or there isn’t move on.
OK, now let’s see if they function with the engine doing the work!
Plug the hose. (With the sled on a jack stand) rev it up full throttle. Watch the hole in the pwr valve cap to confirm the valves are opening or not. (Same as above using the compressed air)
The sled will probably not want to rev out to 8000 but give it as much as it will go.
Did the Valves move in to sight the same as they did with the air?
Mine did not! AW HA! No pressure getting to the Pwr Valves to open them!
Where are they plugged??
Remove the Pwr Valves and clean everything. (See the attached pictures)
Also clean the port coming from the cylinder. They get plugged too! Be sure to clean them all the way into the cylinder. The holes are larger most of their depth then get smaller just before they break into the cylinders. Remove as much crap as you can then BLOW OUT THOROUGHLY!!!
If there is a loos piece of crud left in there? It will get blown into the Pwr valve body and plug the small port again!!
Take a look at the pictures. Hope fully they will show you were to clean the Pwr valve body ports! They are pretty small ports and easy to miss!
I personally don’t like Polaris Power valve operation design allowing the exhaust gasses to flow through the valves until the solenoid closes! All the time the exhaust is flowing through it just lets carbon and gunk build up inside!
On the 800R Ski-doo. It uses the crank case to supply a clean source of Vacuum or Pressure to operate their Pwr valves using Check valves! Works pretty good!
2011 Pro uses alot of fuel. Could it be an injector problem?
--------------------------------------------------------------------------------
My 2011 Pro RMK feels like it's down on power and it seems to be using quite a bit more fuel than it use to!
It has just over 1000 miles.
This is what it does:
It revs pretty quick to about 6800 then is sluggish, it dosent bog but still continues to rev to about 7500 then picks back up to 8000-8100.
Plugged the exhaust valve hose and it seemed to help the sluggishness but still uses more fuel.
I cleaned the exhaust valve hoses and ports going into the cylinders!
Confirmed that the exhaust solenoid valve is working.
Plugs do look rich!
Checked plug wires and all other wiring for wear causing it to short out. Found none.
Clutching is all good.
Replaced the pipe EGT sensor, no change?
It has the yellow injectors in it.
Could the injectors be causing this?
------------------------------------------------------------------
Ok here's the new post:
Ok, this is what I found:
It was an Exhaust Valve problem! The small ports inside the Pwr Valve bodies were plugged!
This is how I found it: (After going over just about everything else!!!!) This is the quick way!
With the hood off!
Remove the Hose from the Pwr Valve side of the Solenoid. (It’s a bitch getting it off the plastic barbed fitting. Be careful not to break the fitting!) Were bypassing the solenoid for now.
To confirm that the Pwr Valves are free and working. Use compressed air at about 3 to 5lbs only
Blow into the hose. Watch the hole on the plastic caps of the Pwr Valves. You should see the end of the Pwr Valve shaft move up in to sight. Release the air pressure and they should pop back outa sight.
Ok, if they move freely then move on.
If not? Take them out and clean at this point then jump straight to the end.
OK, they moved freely.
Start the sled, let it idle. No need to put the hood back on!
Look to see if any smoke or anything comes out of the hose! There should be some smoke puffing out, especially if the sled is cold!!! Some kind of air flow for sure! If there is or there isn’t move on.
OK, now let’s see if they function with the engine doing the work!
Plug the hose. (With the sled on a jack stand) rev it up full throttle. Watch the hole in the pwr valve cap to confirm the valves are opening or not. (Same as above using the compressed air)
The sled will probably not want to rev out to 8000 but give it as much as it will go.
Did the Valves move in to sight the same as they did with the air?
Mine did not! AW HA! No pressure getting to the Pwr Valves to open them!
Where are they plugged??
Remove the Pwr Valves and clean everything. (See the attached pictures)
Also clean the port coming from the cylinder. They get plugged too! Be sure to clean them all the way into the cylinder. The holes are larger most of their depth then get smaller just before they break into the cylinders. Remove as much crap as you can then BLOW OUT THOROUGHLY!!!
If there is a loos piece of crud left in there? It will get blown into the Pwr valve body and plug the small port again!!
Take a look at the pictures. Hope fully they will show you were to clean the Pwr valve body ports! They are pretty small ports and easy to miss!
I personally don’t like Polaris Power valve operation design allowing the exhaust gasses to flow through the valves until the solenoid closes! All the time the exhaust is flowing through it just lets carbon and gunk build up inside!
On the 800R Ski-doo. It uses the crank case to supply a clean source of Vacuum or Pressure to operate their Pwr valves using Check valves! Works pretty good!
