Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2002IMPALA LSREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM - BASIC DIAGNOSTIC PROCEDURES
2002 Chevrolet Impala LS
Engine Control System - Basic Diagnostic Procedures
2002 Chevrolet Impala LSSECTION Engine Control System - Basic Diagnostic Procedures
- Model Identification
- Introduction
- Preliminary Inspection & Adjustments
- No-Start Diagnosis
- Notes
- No Start - Engine Cranks Okay (1.9L)
- No Start - Engine Cranks Okay (2.2L & 2.4L - ALERO, Cavalier, Grand Am & SUNFIRE)
- No Start - Engine Cranks Okay (2.2L - SATURN)
- No Start - Engine Cranks Okay (3.0L - SATURN)
- No Start - Engine Cranks Okay (3.1L & 3.4L)
- Notes
- General Inspection (3.1L Century & Malibu)
- General Inspection (3.1L Grand Prix; 3.4L Alero & Grand Am)
- General Inspection (3.4L Impala & Monte Carlo)
- Ignition Relay Diagnosis (3.1L Grand Prix; 3.4L Impala & Monte Carlo Only)
- Fuel Injector Circuit Diagnosis (3.1L & 3.4L)
- Fuel Pump Electrical Circuit Diagnosis (3.1L Century & Grand Prix; 3.4L Impala & Monte Carlo)
- Fuel Pump Electrical Circuit Diagnosis (3.1L Malibu; 3.4L Alero & Grand Am)
- Fuel System Diagnosis (3.1L & 3.4L)
- Ignition System Diagnosis (3.1L & 3.4L)
- No Start - Engine Cranks Okay (3.5L & 4.0L Aurora)
- No Start - Engine Cranks Okay (3.5L - Intrigue)
- No Start - Engine Cranks Okay (3.8L)
- Notes
- General Inspection (VIN K - Camaro & Firebird)
- General Inspection (VIN K & 1 - Grand Prix)
- General Inspection (VIN K - Impala & Monte Carlo)
- General Inspection (VIN K - Park Avenue)
- General Inspection (VIN K - LeSabre; VIN 1 - Bonneville & Park Avenue)
- General Inspection (VIN K & 1 - Regal)
- Ignition Relay Diagnosis (VIN K - Camaro, Firebird, Impala & Monte Carlo)
- Ignition Relay Diagnosis (VIN K & 1 - Grand Prix)
- Ignition Relay Diagnosis (VIN K & 1 - Regal)
- Ignition System Diagnosis (All Models)
- Fuel Pump Electrical Circuit (VIN K - Grand Prix)
- Fuel Pump Electrical Circuit (Except VIN K - Grand Prix)
- Fuel System Diagnosis (All Models)
- Fuel Injector Circuit (VIN K - Camaro, Firebird, Impala & Monte Carlo)
- Fuel Injector Circuit Diagnosis (VIN K & 1 - Bonneville, Grand Prix, LeSabre & Park Avenue)
- Fuel Injector Circuit Diagnosis (VIN K & 1 - Regal)
- No Start - Engine Cranks Okay (4.6L)
- No Start - Engine Cranks Okay (5.7L)
- Basic Fuel System Checks
- Basic Ignition System Checks
- Idle Speed & Ignition Timing
- Summary
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.