Ford F150 Pickup. Instruction - part 1609

DPFEGR

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

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.

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.

IMTVF (Econoline & Pickup 4.6L, & Navigator 5.4L (4V) Only)

Ensure transmission is in Park or Neutral. Record IMTVF PID value when ignition switch is turned to
OFF position. Then start engine and raise engine speed to 3000 RPM. IMTVF PID value should indicate
NO (no fault) in both situations. If IMTVF PID value indicates YES (fault is present) during either
situation, go to TEST HU: AIR INTAKE SYSTEM , step 65) under SYSTEM TESTS in SELF-
DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.

Miscellaneous Component Or System Checks

Check the following:

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.

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

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.

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.

Check engine compression. Check engine mechanical condition and repair as necessary. Check intake
manifold gasket, camshaft and valves. See appropriate article in ENGINES.

On A/T models, diagnose by symptom (POOR PERFORMANCE). See appropriate OVERHAUL or
DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.

Check for binding or dragging brakes. See appropriate article in BRAKES.

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

Lack/Loss Of Power (Mustang Only)

Ensure A/C clutch disengages under Wide Open Throttle (WOT) conditions and engages a few seconds after
returning to idle. If A/C does not cut off, see A/C DOES NOT TURN OFF DURING WOT (MUSTANG)
symptom under CLIMATE CONTROL (LACK OF A/C COOLING, A/C ALWAYS ON OR A/C
INOPERATIVE).

Lack/Loss Of Power (Supercharged Applications)

Check supercharger bypass system operation. Go to TEST KJ: SUPERCHARGER BY-PASS CONTROL ,
step 13) under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.

Lack/Loss Of Power (F150 Lightning 5.4L SC Only)

Also check high speed fuel pump secondary circuits. Go to TEST KJ: SUPERCHARGER BY-PASS
CONTROL , step 70) 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

Check customer driving habits. 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 Intake Manifold Runner
Control (IMRC) linkage, if equipped. Check instruction transmission or clutch assembly. Check charging system.
See appropriate GENERATORS & REGULATORS article in ELECTRICAL. Check engine RPM/speed
limiting functions of PCM. Check for incorrect high vehicle speed signal from ABS, VSS or OSS.

SPARK KNOCK

Preliminary Checks

Ensure engine is not exceeding normal operating temperature. Check cooling system for overheating, correct
coolant level and coolant concentration. If cooling system is overheating, repair as necessary. See appropriate
article in ENGINE COOLING.

Miscellaneous Component Or System Checks

Check the following:

NOTE:

Some models use a PID that will indicate whether PCM is reducing torque (095E
b0), and if so, why torque is being reduced (095Eb1-13). Refer to scan tool
manufacturer's operating instructions.

2003 Ford Pickup F150

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

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

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

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

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.

Visually inspect engine oil quality.

Additional Intermittent Testing

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

POOR FUEL ECONOMY

Preliminary Checks

Check for restricted air filter/air intake duct. Check Automatic Transmission Fluid (ATF) level. Check fuel
quality and coolant level. Ensure engine is operating at normal operating temperature. Check cooling system for
stuck open or closed thermostat, correct coolant level or coolant concentration. Repair as necessary. See
appropriate article in ENGINE COOLING.

Symptom Checks Using Scan Tool PIDs

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

DPFEGR

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

NOTE:

Fuel consumption can be increased during stop-and-go driving, trailer towing,
short-run operation, extended winter warm-up periods, improper tire inflation or
size, high speed driving, improper axle ratio, road and weather conditions, and
aftermarket add-ons. Determine if any of these factors are the cause of poor fuel
mileage before proceeding with diagnostic procedure.

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

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.

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

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 .

Miscellaneous Component Or System Checks

Check the following:

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

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.

On A/T models, diagnose by symptom (POOR PERFORMANCE). See appropriate OVERHAUL or
DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.

Additional Checks

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 for binding or dragging brakes. See
appropriate article in BRAKES. Check engine mechanical condition. Check for incorrect PCV valve. Check
intake manifold gasket, camshaft and valves and repair as necessary. See appropriate article in ENGINES.

2003 Ford Pickup F150

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

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