Category Archives: Engine and Drivetrain
Engine Hot/ Radiator Cool? Help
13 RZR 800 Crank sensor troubles!
I bought a ’13 RZR 800 S EPS from an insurance sale that was a theft recovery. After a new battery, fluid changes, plugs, fresh gas, etc. it fired right up.
However, over about 1/3 throttle it cuts out exactly like a rev limiter. If I ease into it I can go a little faster than if I mash the gas, but regardless once speed is matched and I need more pedal the same thing happens. I dont recall exact rpm this happens at, and will double check it in the AM. I assume somewhere around 2500 rpm. If I back off the throttle it will continue to move around 10 mph, and if I hold pedal to the floor it will eventually die and sometimes throw a 636 code. So I pulled the engine and replaced the flywheel to be safe in case teeth for recluctor were messed up, and installed a new crank sensor. Same thing. Read another user had a similar issue with a weak fuel pump, and thought while I could fix it, this is a good excuse to upgrade to the Walbro, so I did. Same thing.
I am extremely frustrated with this thing, and after pouring over the forums for 2 weeks I am finally at a loss. Any help would be greatly appreciate.
Thanks!
08 Ranger Razor problems
I bought it about a year ago and it ran great. I washed it about 2 weeks after getting it and it has all been down hill from there.
Now when you start it. It runs extremely rough like on one cylinder. If you try to back it up or go forward 99% of the time it will die and not start. It sounds like the starter does not turn over the motor. It will not engage the motor.
If you do get it to start and let it sit for about 10 minutes it seems like the efi recalibrates and it will back up and run a little better. And if you give it much gas it dies. But if you baby it A LOT :redrzr:it will come out of this situation and run eventually. But it always back fires when you let up off the gas pedal. Once it has been running for about 20 minutes or so it runs pretty good but still not like the first day I bought it.
HELP!
R2C air filter
Super ATV Gear Driven Performance Portal Lift
Check out Northern Rider on YouTube and you get to see these portals tested in extreme off-roading. Any questions let me know.
Rzr 1000 transmission cases new oem
Engine Boggs down under load. Fuel pump testing
But I tend to think that a regulator, whether gas, liquid, or voltage, is supposed to regulate!
I would expect a regulator set at 39 psi would have a supply of greater than 39 psi.
The regulator would then allow pressures of 39 lbs of less to go to the injectors. Any pressure over 39 would open the internal valve and allow the excess to be bled off back to the tank through the fuel return line.
To maintain pressures of 39 psi during full throttle, the pump would have to be capable of higher pressures. I would expect a flow of fuel returning to the tank with engine off or at idle, meaning that you would have a minimum of 39 psi and the regulator is regulating!
If you have a weak pump as the injectors open, the pressure would drop.
Trying to reason through this.
My 08. 800 Boggs down at about 30 mph up hill and is getting worse. Just replaced tank and pump with aftermarket parts about 300 miles ago.
I’m going to build an inline gauge set up to monitor the pressure under load. I will let you know what I find out.
Any thoughts on my analysis, let know.
Clint
2011 800 weird problem
This answer has probably been answered already but ive searched all over the forum and cant find a solution. Thx in advance