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z LACK/LOSS OF POWER z SPARK KNOCK z POOR FUEL ECONOMY z VEHICLE FAILS EMISSIONS/EMISSIONS COMPLIANCE z HISSING SOUND WHEN REMOVING FUEL CAP z EXCESSIVE FUEL ODOR z UNABLE TO REFUEL VEHICLE z WARNING INDICATOR LIGHTS z AUTOMATIC TRANSMISSION DOWN OR UPSHIFT, OR ENGAGEMENT z SPEEDOMETER OR TACHOMETER INOPERATIVE z HIGH OIL CONSUMPTION z ELECTRIC, HYDRAULIC OR VISCTRONIC COOLING FAN INOPERATIVE z ELECTRIC OR HYDRAULIC COOLING FAN(S) ALWAYS ON z EXHAUST SMOKE z FUEL ODOR z ENGINE NOISE z CLIMATE CONTROL (LACK OF A/C COOLING, A/C ALWAYS ON OR A/C INOPERATIVE) z EXHAUST ODOR (SULFUR SMELL) ROUGH OR ROLLING IDLE, STALLS, MISSES, HESITATION OR SURGE Preliminary Checks Check for vacuum leaks. Check air intake duct and air filter. Check ignition wiring. Check fuel quality (octane, Symptom Checks Using Scan Tool PIDs Check and compare the following PID values to PID specifications in appropriate PIN VOLTAGE/PID WARNING: On some models, vehicle may stall if engine is left running during NOTE: The Powertrain Control Module (PCM) is equipped with an over RPM/speed NOTE: On some models, DPFEGR PID may not be available.
2003 Ford Pickup F150 2003 ENGINE PERFORMANCE Trouble Shooting - No Codes - CNG, Flex-Fuel & Gasoline
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