Vehicle Issue Diagnosis
163
Engine backfires
Possible Cause
Solution
Weak spark from spark plugs
Inspect and replace spark plugs as necessary
Incorrect spark plug gap or heat range
Set gap to specs or replace plugs
Old or non-recommended fuel
Replace with minimum 95 octane unleaded fuel
Incorrectly installed spark plug wires
See your dealer
Incorrect ignition timing
See your dealer
Mechanical failure
See your dealer
Speed limiter malfunction
See your dealer
Engine runs irregularly, stalls or misfires
Possible Cause
Solution
Fouled or defective spark plugs
Inspect and replace spark plugs as necessary
Worn or defective spark plug wires
See your dealer
Incorrect spark plug gap or heat range
Set gap to specs or replace plugs
Loose ignition connections
Check all connections and tighten
Water present in fuel
Replace with new fuel
Low battery voltage
Recharge battery to 12.8 Vdc; Check charging
system
Kinked or plugged fuel tank vent line
Inspect and replace
Incorrect fuel
Replace with 95 minimum octane unleaded fuel
Clogged air filter
Inspect and replace as necessary; Replace spark
plugs as necessary
