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6A–8 ENGINE MECHANICAL (6VD1 3.2L) Hesitation Condition Possible cause Correction Hesitation on acceleration Throttle Position Sensor adjustment Replace throttle valve assembly Throttle Position Sensor circuit open Correct or replace Excessive play in accelerator linkage Adjust or replace Mass Airflow Sensor circuit open or Correct or replace Mass Airflow Sensor defective Replace Barometric Pressure (BARO) Correct or replace BARO Sensor defective Replace Intake Air Temperature (IAT) Sensor Correct or replace IAT Sensor defective Replace Hesitation at high speeds Fuel tank strainer clogged Clean or replace (Fuel pressure too low) Fuel pipe clogged Clean or replace Fuel filter clogged Replace Defective fuel pump system Check and replace Fuel Pressure Control Valve leaking Replace Hesitation at high speeds Power supply or ground circuit for Check and correct or replace Fuel Injector defective Replace Cable of Multiport Fuel Injection Correct or replace Hesitation at high speeds Engine Control Module defective Replace Throttle Position Sensor cable Correct or replace Throttle Position Sensor defective Replace Engine Coolant Temperature Sensor Correct or replace Engine Coolant Temperature Sensor Replace Mass Airflow Sensor circuit open or Correct or replace Mass Airflow Sensor defective Replace MAP Sensor cable broken or poor Correct or replace MAP Sensor defective Replace IAT Sensor circuit open or poor Correct or replace IAT Sensor defective Replace Throttle valve not fully opened Check and correct or replace Air Cleaner Filter clogged Replace filter element Power supply voltage too low Check and correct or replace |