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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 279 (Engine Controls And Fuel - 2.0L (LTG) - DTC P0300 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P050D: Cold Start Rough Idle >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify that the fuel pressure is not too low or too high - Refer to Fuel System Diagnosis .
    • If a condition is found, repair or replace components as necessary.
    • If the fuel pressure is OK
  2. Verify that the fuel is not contaminated - Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
    • If the fuel is not contaminated
  3. Replace fuel injectors as indicated by high misfire counts.
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