ENGINE SYMPTOM TROUBLESHOOTING
QUICK DIAGNOSTIC CHART
NO.1 MELTING OF MAIN OR OTHER FUSES
NO.2 MIL COMES ON
NO.3 WILL NOT CRANK
NO.4 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK
NO.5 ENGINE STALLS-AFTER START/AT IDLE
NO.6 CRANKS NORMALLY BUT WILL NOT START
NO.7 SLOW RETURN TO IDLE
NO.8 ENGINE RUNS ROUGH/ROLLING IDLE
NO.9 FAST IDLE/RUNS ON
NO.10 LOW IDLE/STALLS DURING DECELERATION
NO.11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES
NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE
NO.13 KNOCKING/PINGING/DETONATION-ACCELERATION/CRUISE
NO.14 POOR FUEL ECONOMY
NO.15 EMISSION COMPLIANCE
NO.16 HIGH OIL CONSUMPTION/LEAKAGE
NO.17 COOLING SYSTEM CONCERNS-OVERHEATING
NO.18 COOLING SYSTEM CONCERNS-RUNS COLD
NO.19 EXHAUST SMOKE
NO.20 FUEL ODOR (IN ENGINE COMPARTMENT)
NO.21 ENGINE NOISE
NO.22 VIBRATION CONCERNS (ENGINE)
NO.23 A/C DOES NOT WORK SUFFICIENTLY
NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY
NO.25 A/C DOES NOT CUT OFF UNDER WIDE OPEN THROTTLE CONDITIONS
NO.26 EXHAUST SULPHUR SMELL
NO.27 SPARK PLUG CONDITION
INTERMITTENT CONCERN TROUBLESHOOTING
ENGINE CONTROL SYSTEM OPERATION INSPECTION