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6E–403 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS Poor Fuel Economy Symptom
Step Action Value(s) Yes No 1 DEFINITION: Was the “On-Board Diagnostic (OBD) System Check” — Go to Step 2 Go to OBD System Check 2 1. Perform a bulletin search. correct the condition as instructed in the bulletin. Was a bulletin found that addresses the symptom? — Verify repair Go to Step 3 3 Was a visual/physical check performed? — Go to Step 4 Go to Visual/ Physical Check 4 Check owner’s driving habits. D Is the A/C “ON” full time (defroster mode “ON”)? D Are tires at the correct pressure? D Are excessively heavy loads being carried? D Is accelerator too much, too often? Was a problem found? — Go to Step 5 Go to Step 6 5 Review the items in Step 4 with the customer and Is the action complete? — System OK — 6 1. Visually/physically check: Vacuum hoses for splits, kinks, and improper connections and routing as 2. If a problem is found, repair as necessary. Was a problem found? — Verify repair Go to Step 7 7 1. Remove and check the air filter element for dirt or for restrictions. Refer to Air Intake System. 2. Replace the air filter element if necessary. Was a repair required? — Verify repair Go to Step 8 8 1. Remove spark plugs and check for wet plugs, cracks, wear, improper gap, burned electrodes, or Spark Plug Replacement. NOTE: If spark plugs are gas or oil fouled, the cause of 2. If a problem is found, repair as necessary. Was a problem found? — Verify repair Go to Step 9 9 1. Check for low engine coolant level. Refer to Engine Cooling. 2. If a problem is found, repair as necessary. Was a problem found? — Verify repair Go to Step 10 |