Symptoms - Ignition System. Chevrolet Uplander

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2006 🢒 Uplander - 4WD 🢒 Engine 🢒 Engine Controls - 3.5L 🢒 Symptoms - Ignition System

Ignition System

Symptoms

Ignition 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

•	Lack of Power, Sluggishness, or Sponginess

•	Detonation/Spark Knock

•	Hesitation, Sag, Stumble

•	Cuts Out, Misses

•	Poor Fuel Economy

•	Rough, Unstable, or Incorrect Idle and Stalling

•	Dieseling, Run-On

•

Backfire

•	Inspect for proper Ignition System operation. Refer to Electronic Ignition (EI) System Diagnosis .

•	Inspect spark plugs and spark plug wires. Refer to Spark Plug Wire Inspection and Spark Plug Inspection .

•	Inspect the spark plugs for correct application. Refer to Ignition System Specifications .

•	Hard Start

•	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 the crankshaft position (CKP) sensor for the following conditions:

•	Damage and proper installation--Refer to Crankshaft Position Sensor Replacement .

•	Inspect the CKP sensor and corresponding harness for electromagnetic interference (EMI).