What to do if my Polaris Ranger 4X4 engine runs irregularly, stalls, or misfires?
- Mmichael37Aug 13, 2025
If your Polaris Utility Vehicle engine runs irregularly, stalls, or misfires, here's what to check: * Inspect, clean, and/or replace fouled or defective spark plugs. * Set the spark plug gap to specifications or replace the plugs if the gap or heat range is incorrect. * Ensure ignition connections are tight. * Replace fuel if water is present, if it's not the recommended type, if it's low or contaminated, if it's low octane, or if it's very high octane. Cleaning the fuel system may also help. * Recharge the battery to 12.8 VDC if the voltage is low. * Inspect and replace a kinked or plugged fuel tank vent line. * Inspect, clean, or replace a clogged air filter. Engine issues can also stem from mechanical failure.