TROUBLE DIAGNOSES — Diagnostic Table (Cont'd) — Symptom & Condition 24: Backfire through the intake
EF & EC-62flowchartDiagnostic Table (Cont'd)
SYMPTOM & CONDITION 24 — Backfire through the intake
Possible Causes Matrix — Symptom 24: Backfire through the intake
| Category | Possible Causes | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|---|
| SPECIFICATIONS | Mixture ratio (too lean) | O | O | O | O | |||
| SPECIFICATIONS | Ignition timing (too retarded) | O | ||||||
| FUEL SYSTEM | Injectors (clogged) | O | ||||||
| INTAKE SYSTEM | Air duct (air leaks) | O | ||||||
| INTAKE SYSTEM | Intake manifold (gaskets) (air leaks) | O | ||||||
| CONTROL SYSTEM | Air flow meter | O | ||||||
| CONTROL SYSTEM | Exhaust gas sensor | O | O |
SPECIFICATIONS
Possible CausesMixture ratio (too lean)
1O
2
3O
4
5O
6O
7
SPECIFICATIONS
Possible CausesIgnition timing (too retarded)
1
2O
3
4
5
6
7
FUEL SYSTEM
Possible CausesInjectors (clogged)
1
2
3
4O
5
6
7
INTAKE SYSTEM
Possible CausesAir duct (air leaks)
1O
2
3
4
5
6
7
INTAKE SYSTEM
Possible CausesIntake manifold (gaskets) (air leaks)
1O
2
3
4
5
6
7
CONTROL SYSTEM
Possible CausesAir flow meter
1
2
3
4
5
6
7O
CONTROL SYSTEM
Possible CausesExhaust gas sensor
1
2
3
4
5O
6O
7
SERVICE PROCEDURE
Service Procedure Flowchart — Symptom 24: Backfire through the intake
Rendering diagram…