I have a 2011 Grizzly 700 EFI and now have a problem. It all started with a battery that I think had a bad cell, so I got a need batt. Now it seems to run like crap, after talking to someone they had me put some mechanic in a bottle in the tank and run it for a bit. At this time I don’t think it’s a bad gas issue. I noticed when I try use the winch to raise the plow the engine stalls and when turning the wheels it knocks and bucks pretty bad. If I drive it in a straight line back and forth it’s fine but it seems like when the power steering puts a load on the electric system, like winch is when runs bad. It will start and idles fine. At this point I have no idea what to do.