
1.60
9850068 R01 - 2020-2021
RZR
PRO XP / XP 4 Service Manual
© Copyright Polaris Industries Inc.
FUEL SYSTEM DIAGNOSTICS
FUEL SYSTEM TROUBLESHOOTING
FUEL STARVATION / LEAN MIXTURE
SYMPTOMS
CAUSES
• Hard start or no start
• Bog
• Backfire
• Popping through Intake / Exhaust
• Hesitation
• Detonation
• Low Power
• Spark plug erosion / fouling
• Engine runs hot
• Surging
• High / Erratic idle
• No fuel in tank
• Restricted tank vent, or routed improperly
• Fuel lines or fuel injectors restricted
• Fuel filter plugged
• Fuel pump inoperative
• Air leak in system
• Intake air leak (throttle shaft, intake ducts, air box
cover)
• Faulty oxygen sensor
RICH MIXTURE
SYMPTOMS
CAUSES
• Hard start or no start
• Bog
• Backfire
• Popping through Intake / Exhaust
• Hesitation
• Detonation
• Low Power
• Spark plug erosion / fouling
• Engine runs hot
• Surging
• High / Erratic idle
• No fuel in tank
• Restricted tank vent, or routed improperly
• Fuel lines or fuel injectors restricted
• Fuel filter plugged
• Fuel pump inoperative
• Air leak in system
• Intake air leak (throttle shaft, intake ducts, air box
cover)
• Faulty oxygen sensor
Summary of Contents for RZR PRO XP 2020
Page 3: ...REVISION INDEX REV DATE CHANGES R01 11 10 2020 Initial Release...
Page 6: ......
Page 587: ...Symptom and Occurrence Checklist BEEN PRESENT SINCE NEW 51...
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