Vehicle Issue Diagnosis
169
Engine Backfires
Possible Cause
Solution
Weak spark from spark plugs
Inspect, clean and/or replace spark plugs
Incorrect spark plug gap or heat range
Set gap to specs or replace plugs
Old or non-recommended fuel
Replace with new fuel
Incorrectly installed spark plug wires
See your dealer
Incorrect ignition timing
See your dealer
Mechanical failure
See your dealer
Engine Runs Irregularly, Stalls or Misfires
Possible Cause
Solution
Fouled or defective spark plugs
Inspect, clean and/or replace spark plugs
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
