Have the PCV for a 2009 Dragon 163 c/w SLP single pipe. Machine runs assume without PCV connected. I run at 3000-6000' in the northwest part of BC. I originally wanted the PCV for piece of mind for the mid range lean issue and potential burn down. Not so sure now. With the PCV connected the engine consistently has a very noticeable mid range giggle over the 5500-6750 rpm range. I have tried two maps from Dyno Jim and the SLP map. Same story with all three. I do not have a Auto tune unit but did lean the SLP map down in the mid range and it helped a little. Ran this for half a day only. Diconeccted the PCV and engine ran great. Reason for leaning the SLP down was that it was the leanest of all three maps in the mid range to begin with and Dyno Jim had originally suggested to me to run the map with the leanest mix because my machine was running very well with NO mid range issues at all to begin with.Thought this was going to be a plug and run thing,I guess not???????? Really at a loss here.
PCV running issues. Help!!!!
- Thread starter gerrman
- Start date
I have a 09 800 rmk also, with a pcv and a map from Jim. I have had to tweak the higher rpm numbers a bit for riding at elevation. I have a egt guage on the way too, for tuning and piece of mind. Pain in the butt hauling the laptop with you but I think its better than trying to tweak the map when you unload every morning before a ride and seeing what happens at elevation.
Did you sync the PCV with your TPS? If the PCV thinks you are at 20% throttle when you are at 10% it could cause some issues.
Yep....have double checked that twice over the past four rides. It has all been in sync all the time.
I know our sleds are set up nearly identical. Mine ran awesome without the PCV as well but I put it on for peace of mind in the mid to prevent lean burn down. I started with the DTJ maps which had a crazy burble in the mid. (very rich map) I then went to SLP's map (ethanol wired unplugged) which was way better but still had a little studder in the mid. I plugged in my wires (5% leaner) and it is good now, no issues at all. You could certainly trim the map down to the point where you are approaching zeros with no risk and see what happens. Once you hit the zeros your PCV is not doing anything for you, but if you have ANY added fuel in your mid range you are building in a safety net for lean burn down. The SLP is also slightly leaner than the stock map in the high RPM range which seems to work well for me.
Are the maps you are running for the ECU reflash you have. I believe the last two reflashes from polaris added fuel in the mid range.
Thanks GKR. You are correct on the setups and that is what is perplexing to me on why my engine is responding in the way it is. I believe my operating elevation is a little lower, 3-6000'. That is the only real difference other than weather. We have a higher humidity level here as well, which myself and many others around here feel affects our EFI ECU's ability to tune itself to weather conditions and/or elevation changes at times. I have tried the "Chad O" map as well and it was very similar to the SLP. I will continue to lean the SLP map in the mid-range until it eliminates the bubble/studder. At that point there will be more fuel in the mid-range, which is what I want. Ride it like I stole it is all that is left. Need more snow here though. We have poorer snow conditions so far this season around here than we did last, so much for La Nina!!!!
J
jols
New member
Reading this and I had to laugh... Cause this is EXACTLY what mine is doing!! I thought I was the only one with this issue. Just curious if you found out a solution. I've got three maps from DTR (Stoutner 157, Stock "Chad O" and Stock "Norm Lite") and I'm experiencing this issue with all three maps. I really only notice the burble when I let off of WOT. It runs fine when the PCV is unplugged
I'm wondering if it's because of this... When I look at the maps on the table, all three maps are leaned out up top. Example 8000 set to -10 and around the 6500 mark it's set to +5 at 40% throttle so letting off changes the fuel 15 points richer... Could this cause the burble? Can someone chime in here and tell me this is crazy talk??!! Lol... I was thinking of changing the 100% throttle points back to zeros (back to stock) to see if this helps?? Opinions welcome....
I'm wondering if it's because of this... When I look at the maps on the table, all three maps are leaned out up top. Example 8000 set to -10 and around the 6500 mark it's set to +5 at 40% throttle so letting off changes the fuel 15 points richer... Could this cause the burble? Can someone chime in here and tell me this is crazy talk??!! Lol... I was thinking of changing the 100% throttle points back to zeros (back to stock) to see if this helps?? Opinions welcome....
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Are you guys running the stocks exhaust valve hose/solenoid setup? The maps you are running are dependent upon same valve openings of the engine they were developed on.
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