Ford F150 Pickup. Instruction — part 1607

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LACK/LOSS OF POWER

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SPARK KNOCK

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POOR FUEL ECONOMY

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VEHICLE FAILS EMISSIONS/EMISSIONS COMPLIANCE

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HISSING SOUND WHEN REMOVING FUEL CAP

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EXCESSIVE FUEL ODOR

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UNABLE TO REFUEL VEHICLE

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WARNING INDICATOR LIGHTS

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AUTOMATIC TRANSMISSION DOWN OR UPSHIFT, OR ENGAGEMENT

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SPEEDOMETER OR TACHOMETER INOPERATIVE

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HIGH OIL CONSUMPTION

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ELECTRIC, HYDRAULIC OR VISCTRONIC COOLING FAN INOPERATIVE

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ELECTRIC OR HYDRAULIC COOLING FAN(S) ALWAYS ON

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EXHAUST SMOKE

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FUEL ODOR

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ENGINE NOISE

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CLIMATE CONTROL (LACK OF A/C COOLING, A/C ALWAYS ON OR A/C INOPERATIVE)

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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,
winter/summer grade fuel, methanol, etc.). Check wiring harness connector for poor connections.

Symptom Checks Using Scan Tool PIDs

Check and compare the following PID values to PID specifications in appropriate PIN VOLTAGE/PID
VALUE CHARTS article.

WARNING:

On some models, vehicle may stall if engine is left running during
refueling. Advise customer to always turn engine off during refueling to
avoid contamination or damage to EVAP system.

NOTE:

The Powertrain Control Module (PCM) is equipped with an over RPM/speed
limiting function that will shut off fuel delivery when predetermined engine
speed is exceeded.

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

DPFEGR

If DPFEGR HOT IDLE PID is not within .15 volt of KOEO value;

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For vehicles equipped with ESM EGR, go to TEST HH: EXHAUST GAS RECIRCULATION
SYSTEM MODULE , step 100) under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG,
FLEX-FUEL & GASOLINE article.

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All others, go to TEST HE: EGR SYSTEM , step 100) under SYSTEM TESTS in SELF-
DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.

LONGFT1 &/Or LONGFT2

If LONGFT1 or LONGFT2 PID is low (-20 percent or less), concentrate checks in areas that would cause
engine to run rich. If LONGFT1 or LONGFT2 PID is high (+20 percent or more), concentrate checks in
areas that would cause engine to run lean.

VPWR

VPWR PID voltage should be 10.5-17.0 volts and within .5 volt of battery voltage. If VPWR PID voltage
is not 10.5-17.0 volts, check and repair charging system as necessary. See appropriate GENERATORS &
REGULATORS article in ELECTRICAL. If VPWR PID voltage is 10.5-17.0 volts but not within .5 volt
of battery voltage, check B+ circuit to PCM power relay (or CCRM), VPWR circuit between PCM and
PCM power relay or CCRM, and PWR GND circuits. See WIRING DIAGRAMS .

Engine Runs Rough At Idle

Turn ignition switch to ON position. Using scan tool, select INJxF PIDs from PID/DATA MONITOR &
RECORD menu. There is one INJxF PID available for each engine cylinder, and the "x" indicates the
appropriate injector number (1-10). AllINJxF PIDs should indicate NO (no fault). If any INJxF PID value
indicates YES, an injector fault exists. Go to TEST HA: NATURAL GAS FUEL CONTROL , step 60)
(Natural Gas models), or go to TEST H: FUEL CONTROL , step 56) (all others) under SYSTEM TESTS in
SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.

Engine Now Starts, But Stalls In Park Or Neutral

If engine will start and run normally at part throttle, check Idle Air Control (IAC) system. Go to TEST KE:
IDLE AIR CONTROL VALVE , step 2) under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-
FUEL & GASOLINE article.

Miscellaneous Component Or System Checks

Check the following:

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Check Mass Air Flow (MAF) sensor. Go to TEST DC: MASS AIRFLOW SENSOR , step 25) under
SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.

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Check secondary ignition system. Go to TEST JB: SECONDARY IGNITION , step 1) under SYSTEM
TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE Trouble Shooting - No Codes - CNG, Flex-Fuel & Gasoline

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Check fuel delivery system. Go to TEST HB: NATURAL GAS FUEL DELIVERY SYSTEM , step 1)
(Natural Gas models), or go to TEST HC: GASOLINE FUEL DELIVERY SYSTEM , step 1) (all
others) under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.

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Check exhaust system for restriction. Go to TEST HF: CATALYST EFFICIENCY MONITOR &
EXHAUST SYSTEMS , step 1) under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-
FUEL & GASOLINE article.

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Check PCV system. For Aviator and Mustang 4.6L, go to TEST HG: PCV SYSTEM , step 1) under
SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. For all others,
go to TEST HG: PCV SYSTEM , step 4) under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG,
FLEX-FUEL & GASOLINE article.

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Check EVAP emission system for blockages (engine stalls) or leaks (excessive fuel odor). Service
appropriate symptom under SYSTEM TESTS (EVAPORATIVE EMISSION) in SELF-
DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.

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On A/T models, ensure transmission is functioning properly. If engine stalls during transmission
engagement, check transmission solenoids. See appropriate DIAGNOSIS article in AUTOMATIC
TRANSMISSIONS.

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Check engine mechanical condition. Check compression, camshaft, valve train components, etc. and
repair as necessary. See appropriate article in ENGINES.

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Check air intake system. Go to TEST HU: AIR INTAKE SYSTEM , step 1) under SYSTEM TESTS in
SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.

Natural Gas Vehicles With Rough Idle

Check injector circuits between Natural Gas (NG) module and injectors. Go to TEST HA: NATURAL GAS
FUEL CONTROL , step 57) under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL &
GASOLINE article.

Idle Concerns With A/C On (3-Wire Sensor)

Check A/C Pressure (ACP) sensor input to PCM. Go to TEST DS: AIR CONDITIONING PRESSURE
SENSOR , step 22) under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE
article.

Additional Intermittent Testing

Go to TEST Z: INTERMITTENT , step 1) under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-
FUEL & GASOLINE article.

Additional Checks

NOTE:

Some applications have a PID that will indicate whether the PCM is reducing
torque (TQ_CNTL)(#095E b0), and if so, why the torque is being reduced
(#095Eb1-13) (0 = No torque reduction requested; 1 = Torque Truncation. Cuts
fuel to protect when line pressure fails to minimum limit; 2 = Traction Control
Event. Cuts fuel and/or spark for traction control; 3 = Vehicle Speed Limit - Cuts

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE Trouble Shooting - No Codes - CNG, Flex-Fuel & Gasoline

Ensure Powertrain Control Module (PCM) Vehicle Identification (VID) block is correct. See FLASH
VEHICLE IDENTIFICATION BLOCK PROCEDURE under PROGRAMMING PCM in SELF-
DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Check engine RPM/speed limiting functions of
PCM. Check for incorrect high vehicle speed signal from ABS, VSS or OSS. Check driveline(s), instruction
transmission or clutch assembly. Check charging system. See appropriate GENERATORS & REGULATORS
article in ELECTRICAL. Check traction control system, if equipped. If engine surges with A/C on, or has a
rolling idle and/or engine stumble when A/C cycles on, check A/C system and A/C compressor diode. See
appropriate MANUAL or AUTOMATIC A/C-HEATER SYSTEMS article in AIR CONDITIONING &
HEATING. Check cruise control system if engine surges with cruise control on. See appropriate CRUISE
CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT.

HARD START/LONG CRANK OR ERRATIC START/CRANK

Preliminary Checks

Check battery condition and starter current draw.

Miscellaneous Component Or System Checks

Check the following:

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Check secondary ignition system. Go to TEST JB: SECONDARY IGNITION , step 1) under SYSTEM
TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.

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Check fuel delivery system. Go to TEST HB: NATURAL GAS FUEL DELIVERY SYSTEM , step 1)
(Natural Gas models), or go to TEST HC: GASOLINE FUEL DELIVERY SYSTEM , step 1) (all
others) under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.

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Check exhaust system for restriction. Go to TEST HF: CATALYST EFFICIENCY MONITOR &
EXHAUST SYSTEMS , step 1) under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-
FUEL & GASOLINE article.

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Check PCV system. For Aviator and Mustang 4.6L, go to TEST HG: PCV SYSTEM , step 1) under
SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. For all others,
go to TEST HG: PCV SYSTEM , step 4) under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG,
FLEX-FUEL & GASOLINE article.

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Check EVAP emission system for blockages (engine stalls) or leaks (excessive fuel odor). Service
appropriate symptom under SYSTEM TESTS (EVAPORATIVE EMISSION) in SELF-
DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.

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Check air intake system. Go to TEST HU: AIR INTAKE SYSTEM , step 1) under SYSTEM TESTS in
SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.

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Check starting system. See appropriate STARTERS article in STARTING & CHARGING SYSTEMS.

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Check Mass Airflow (MAF) sensor for contamination.

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Check high speed fuel pump secondary circuits (Lightning 5.4L SC models only). Go to TEST KA:
FUEL PUMP RELAY , step 70) under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-
FUEL & GASOLINE article.

fuel).

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE Trouble Shooting - No Codes - CNG, Flex-Fuel & Gasoline