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Did my rzr jump time?

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16K views 39 replies 11 participants last post by  Pedro0113  
#1 ·
Ok guys i know your gonna jump me but i have seached till im blue in the face and i cannot find an article.

I have a 2010 polaris rzr 800 with the mxc turbo setup. dynatek fs ignition and i believe it has a big borr kit.

Ok so here is whats going on, i was riding last night racing a 1000 across the flats did 3 hard passes and on the way back from the 3rd pass it just shut off like someone turned the key off. I went to restart and the batt was dead. I got a new battery this morning, went to fire it up and nothing. I checked spark...nothing. i unhooked the dynatek ignition and got spark back but it will not run. It spits and pops and sounds flooded. Pulled the plug, it was clean as a pin. Could it have jumped time? Any help would be greatly appreciated.
 
#10 ·
While I suppose anything is possible, I think it is unlikely that on this car the timing jumped. It is gear driven only, no timing chain like the 900/1000 motors. If timing has jumped, I think you will be in a position that parts will be needed.

The fact that you unhooked the Dynatek module and got some change, is a good indication to me that it is an electrical/control problem.

Do you have a service manual to review?
 
#16 ·
#19 ·
Ok guys just an update. I got back to my shop and rewired the crank position sensor because it looked like somebody had cut the wires to check it for some reason. so now they are connected and not showing any bare wire, but I still cannot get my machine to run. I am unsure how to check the injectors?!? Any help or ideas on how to check those would be great.
 
#21 ·
by the starter solenoid mine has I think a 40 amp self reseting breaker in the harness it is about 1/2" wide x 1" long and taped in like someone was board and didn't have anything better to do lol
 
#23 ·
ok guys I have went over this thing with a fine tooth comb. primary clutch has a big crack.
had a bad crank bearing. pulled the motor replaced them.
checked timing- perfect
checked all sensors- perfect
valves- good
trinity racing big bore kit- my compression is 120
fuel pressure is 40 lbs
good fire on both plugs
both injectors are firing
still a no start issue
 
#26 ·
120psi of compression is your culprit. That is way low and most likely your cause. It should be around 170-180. If you are running a turbo setup have you had any work done to the crank? If not you are going to end up twisting the crank. Happened to mine and it was factory non turbo. It was missing and throwing a crank position sensor code. Noticed a major wobble on the primary end of the crank. Tore it down and the crank had walked and separated from the center section. It moved enough it dug into the lower case and shave some of the aluminum off. I ended up going with a hot rods crank kit and new bearing throughout for a complete rebuild.