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Engine Backfires
Possible Cause
Weak spark from spark plugs
Incorrect spark plug gap or heat range
Old or non-recommended fuel
Incorrectly installed spark plug wires
Incorrect ignition timing
Mechanical failure
Speed limiter malfunction
Engine turns over, Fails to start
Possible Cause
Fouled or defective spark plugs
Worn or defective spark plug wires
Incorrect spark plug gap or heat range Set gap to specs or replace plugs
Loose electrical connections
Water present in fuel
Low battery voltage
Kinked or plugged fuel tank vent line
Incorrect fuel
Clogged air filter
Reverse speed limiter malfunction
Electronic throttle control malfunction See your dealer
Vehicle Issue Diagnosis
Solution
Inspect and replace spark plugs as necessary
Set gap to specs or replace plugs
Replace with minimum 87 octane unleaded fuel
See your dealer
See your dealer
See your dealer
See your dealer
Solution
Inspect and replace spark plugs as necessary
See your dealer
Check all connections and tighten
Replace with new fuel
Recharge battery to 12.8 Vdc; Check charging system
Inspect and replace
Replace with 87 minimum octane unleaded fuel
Inspect and replace as necessary; Replace spark plugs as necessary
See your dealer
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