• During hunting season Nov 2014, I used the rzr to set stands all day on a Friday. Ran fine.
• Parked it Friday night.
• Got in Saturday morning to go hunt and it would start up and idle. Give it gas it died. Tried this several times and no luck. Pulled the air filter off. Tried running without air filter to see what would happen. No difference. Don’t believe there is a vane sensor on the 2012, but tried mashing the gas before starting, etc. to see if that would work. No success. Rzr stopped starting all together and would just turn over after several attempts. Cussed extensively and pushed it into the trailer….went hunting. Didn’t get anything for the 2014 deer season, cussed some more.
• April 2015, weather warms up enough to work on the rzr. Got it out of the trailer.
• Read forums and thought maybe the problem was a crank positioning sensor. Bought one and replaced. No difference. Wouldn’t start.
• Ohmed out several connections (CPS, TPS, MAP, etc.) all seem to check out ok.
• Checked fuel pressure at the rail, meets service manual specs. So doesn’t seem like it is the fuel pump issue I have read about several times on the forum.
• For the heck of it, checked compression on both cylinders…. 60 psi on one, 85 on the other!!!
• Pulled off the jug. Rings are seized in the pistons. No noticeable significant scoring on cylinders. Engine is stock.
• Replaced pistons and rings, reassembled. Started up.
• Rolled out of garage to take around the block to let rings seat in….got to end of the driveway. Rzr dies.
• Try restarting. Will idle, but give it gas it dies.
• Pull it back into the garage and read some more on the forums. Since the rings were seized in the piston it seems to indicate there is an oil problem? Dip stick indicates oil level is fine.
• Read about issues with oil pressure relief valve on the RZR 800 engine, so checked that.
• The dowel appears to be stuck. Won’t come out after several different attempts (aerokril, pen magnetic, etc).. So this would seem to mean it is stuck in a high oil pressure mode?
• I buy an oil pressure gauge and sending unit. Change oil and filter. Install pressure gauge and try starting the rzr. Rzr starts idles, oil pressure builds and gauge pegs at 100 psi, then rzr dies.
So, it appears I have a few things now to try and fix/figure out.
A) Oil pressure relief value sticking…. Any good suggestions on how to get it out (without pulling the engine preferably)? I already bought a new dowel once I get it out. Also considering buying the Holz adjustable valve I have read about on here. So that will help in the future….but not fix the current situation.
B) Why would the rings have seized in the piston? I am concerned about trying to start the engine too many times now to troubleshoot incase the rings seize again.
C) Any suggestions as to why it would start, idle and then die? It currently dies even if you do not give it gas.
Thanks in advance for any advice and help.
