Symptoms - Sensors/Systems
WARNING: This page is about a different variant/trim than selected.
Sensor/System
| Symptoms |
Sensor/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. |
- Hard Start
- Surges/Chuggles
- Hesitation, Sag, Stumble
- Cuts Out, Misses
- Poor Fuel Economy
- Rough, Unstable, or Incorrect Idle and Stalling
- Backfire
|
- Inspect the mass air flow (MAF) sensor for proper installation, obstruction, contamination, and damage. Refer to Mass Airflow Sensor Replacement
.
- Inspect the MAF sensor for proper seating of the connector and terminals.
- Inspect the manifold absolute pressure (MAP) sensor for proper installation, obstruction, and damage. Refer to Manifold Absolute Pressure Sensor Replacement
.
- Ensure the quality of the MAP sensor vacuum source.
|
- Hard Start
- Detonation/Spark Knock
- Hesitation, Sag, Stumble
- Poor Fuel Economy
- Rough, Unstable, or Incorrect Idle and Stalling
|
|
- Surges/Chuggles
- Lack of Power, Sluggishness, or Sponginess
- Detonation/Spark Knock
- Poor Fuel Economy
- Backfire
|
Monitor the Knock Sensor (KS) System for excessive spark retard activity. Refer to the knock sensor description within the Electronic Ignition (EI) System Description
. |
| Hesitation, Sag, Stumble |
|
- Surges/Chuggles
- Lack of Power, Sluggishness, or Sponginess
- Hesitation, Sag, Stumble
- Cuts Out, Misses
- Poor Fuel Economy
- Rough, Unstable, or Incorrect Idle and Stalling
- Backfire
|
Inspect for contaminated oxygen sensor (O2S). |
| Poor Fuel Economy |
Inspect for proper operation of the speedometer. Refer to Speedometer and/or Odometer Inaccurate or Inoperative
. |