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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1781 (Engine Controls - Symptom Charts (Except Diesel & Hybrid)) >> Step 3: No Diagnostic Trouble Codes (DTCs) Present Symptom Charts >> Chart 10

Chart 10

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NOTE: Driving styles may have a significant influence on fuel economy. Verify the concern before starting an in-depth diagnosis. The following external factors may contribute to poor fuel economy:
SYSTEM/COMPONENT REFERENCE (Pinpoint Test unless noted)
  1. Check the following PIDs:
    • LONGFT1/LONGFT2 (value between -20 and +20%)
    • VPWR (value between 10.5 and 17.0 volts, and within 0.5 volt of battery voltage)
  1. LONGFT1/LONGFT2 value low (-): 
  2. Continue diagnosis. Concentrate checks in areas that would cause the engine to run rich.
  3. LONGFT1/LONGFT2 value high (+): 
  4. Continue diagnosis. Concentrate checks in areas that would cause the engine to run lean.
  5. VPWR not between 10.5 and 17.0 volts: 
  6. REFER to the appropriate CHARGING SYSTEM - GENERAL INFORMATION article.
  7. VPWR between 10.5 and 17.0 volts, but not within 0.5 volt of battery voltage: 
  8. CHECK the B+ voltage to the PCM power relay. CHECK the VPWR circuit between the PCM and the PCM power relay. CHECK the PWR GND circuits.
  1. Verify the engine operates at normal temperature.
  1. Visual. REFER to the appropriate ENGINE COOLING article to diagnose any cooling system concerns that are present.
  1. Secondary Ignition System
  1. For vehicles equipped with a coil pack ignition system, refer to PINPOINT TEST JC - Secondary Ignition (Coil Pack) .
  2. For all others, refer to PINPOINT TEST JB - Secondary Ignition (COP) .
  1. Fuel System
  1. refer to PINPOINT TEST HC - Fuel Delivery System .
  1. Exhaust System
  1. refer to PINPOINT TEST HF - Catalyst Efficiency Monitor and Exhaust Systems .
  1. Variable Camshaft Timing (VCT) System
  1. refer to PINPOINT TEST HK - Variable Camshaft Timing (VCT) .
  1. Transmission Fluid Level
  1. Visual
  1. Automatic Transmission
  1. REFER to the appropriate AUTOMATIC TRANSMISSION/TRANSAXLE article.
  1. PCV System
  1. refer to PINPOINT TEST HG - Positive Crankcase Ventilation (PCV) System .
  1. Additional Checks:
  1. REFER to the applicable service information article.
  1. Additional Testing
  1. refer to PINPOINT TEST Z - Intermittent .
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