Symptoms
| Fuel System
|
Find the symptom in the left column and perform the test/inspection procedure in the right column, be sure to review each cell of the table to identify all tests for a symptom.
|
| • | Lack of Power, Sluggishness, or Sponginess |
| • | Detonation/Spark Knock |
| • | Hesitation, Sag, Stumble |
| • | Rough, Unstable, or Incorrect Idle and Stalling |
|
| • | Inspect the throttle body for coking. |
| • | Inspect for lean or rich conditions. Refer to
DTC P0171 or P0172
, Conditions for Running the DTC. |
|
Dieseling/Run On
| Test the fuel system for excessive fuel pressure. Refer to
Fuel System Diagnosis
.
|
| • | Lack of Power, Sluggishness, or Sponginess |
| • | Detonation/Spark Knock |
| • | Hesitation, Sag, Stumble |
| • | Rough, Unstable, or Incorrect Idle and Stalling |
| Test for proper operation of the fuel injectors. Refer to the
Fuel Injector Diagnosis
.
|
| • | Lack of Power, Sluggishness, or Sponginess |
| • | Hesitation, Sag, Stumble |
| • | Rough, Unstable, or Incorrect Idle and Stalling |
| Inspect the evaporative emission (EVAP) system for the following:
| • | EVAP System for excess fuel in the EVAP lines and/or in the EVAP canister |
| • | EVAP system for integrity--Refer to
DTC P0442
. |
|
