Lol wait......you put a golf tee in the weep hole on water pump? Dude......that is made to prevent said problems you've had. If it leaks coolant replace water seal if it leaks oil replace engine seal. Who told you that was ever a good idea?

 

Lol well all the cool kids were doing it. I knew better and have since warned them they are right behind me with an engine bebuild

 

Oh man that is too funny!! There is a great way to vent the weep hole with a drilled out grease zerk and clear plastic hose. I'm not by my RZR all week but I'll take pictures and show you next week.

 

I already drilled and tapped the hole to put a snorkel tube on it to keep the gritty muck out👍

 

Ok so I pulled the rail and injectors. Held the injectors in the rail in one hand with a death grip over the prop shaft and turned the key on. No fuel. Not a drip. Cranked it over and they both sprayed (what looked to me) like normal. Wert da ferk? I'm going to sleep on it

 

Since your 800 was running well untill it wasn't, and you have good fueling., I would check the cam timing to see if it jumped. The symptoms, like only turns with plugs out and spitting backfiring do fit the bill for a timing chain slip.

 

Ugh finally realized check engine light wasn't supposed to stay on with engine not running. Showing codes 637 and 651. Not sure if I caused it when I pulled the 1 injector wire off or not. Tried gas pedal reset with no luck. Will update tmrw

 

Good luck man. These things are a pain in the arse but fun lol.

 

Cam phase sensor wires show voltage and ground. Sensor does have a ding in it prob from when I installed the cam. Ripping out to bro in laws to borrow his sensor

 

Well that's disappointing. Known good sensor installed and exactly the same result.

 

Thought I asked of anyone knew the pinout on the ecu / ecm so I can jump the cam phase output wire but I can't find the post. Tried a known good controller out of a 13 too and still no luck. Anyone???

 

Contact #33 in ECU connector.

 

CA 800 you really know your stuff. Love the detailed posts you provide. Thx

 

Thanks for the info CA 800! Turns out the circuit is good. Back to looking for a mechanical failure

 

Well this is interesting. The woodruff key for the flywheel sheared and it spun on the crank. I still had to use a puller to get the flywheel off but it definitely spun. Technically the cam and crank were still in phase but the ecu was picking the wrong crank position off the flywheel

 

View attachment 678505
Well this is interesting. The woodruff key for the flywheel sheared and it spun on the crank. I still had to use a puller to get the flywheel off but it definitely spun. Technically the cam and crank were still in phase but the ecu was picking the wrong crank position off the flywheel

Yep that would cause an issue! In your 1st post the way I read it, it sounds lile you had it running without the primary clutch on it? I wonder if that had anything to due with it shearing the flywheel key?

 

Yep I was revving without the primary on it trying to burp the cooling system. Not doing that again!

 

Can anyone confirm this is an ANSI 505 key (5/32" x 5/8")? All I can get for a measurement off the old trashed one is .157" width

 

FTR it is a 505 key but the keyway in the taper hub is cut on the axis of the shaft, not parallel to the taper so depth isn't critical. Reading on here I learned that the taper engagement handles the torque, not the key (it's only for timing purposes). I failed to tighten the flywheel retaining nut sufficiently the first time and the starter torque / firing harmonics sheared the key. I had to lap the tapers with grinding paste to clean them up again and torqued the shit out of the nut. Reinstalling the engine today

 

what were ur symptoms i feel like this is my issue with my 800 i rebuilt it a couple months ago and it was running real good first couple rides then it just started backfiring giving me code 637 it would shut off when would gas full throttle it would happen at higher rpm wouldn’t go pass 5000 rpm felt like it had 2 step popping noises lol before it would shut down i already put new fuel pump spark plugs and camshaft sensor tbap throttle body checked harness i also swicthed ecu still ran like crap so im pretty sure my key sheared too just to lazy to remove the engine but gonna get 2 work i’ll keep updating on my issue

 

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