TROUBLE DIAGNOSES — Diagnostic Table (Cont'd) — Symptom & Condition 25: Backfire through the exhaust
EF & EC-63flowchartDiagnostic Table (Cont'd)
SYMPTOM & CONDITION 25 — Backfire — through the exhaust
Possible Causes Matrix — Symptom 25: Backfire through the exhaust
| System | Possible Causes | 1 | 2 | 3 | 4 |
|---|---|---|---|---|---|
| SPECIFICATIONS | Mixture ratio (too rich) | O | O | ||
| FUEL SYSTEM | Injectors (fuel leaks) | O | |||
| IGNITION SYSTEM | (missing) | O | |||
| INTAKE SYSTEM | Air cleaner element (clogged) | O | |||
| CONTROL SYSTEM | Idle switch (remaining OFF) | O |
SPECIFICATIONS
Possible CausesMixture ratio (too rich)
1O
2O
3
4
FUEL SYSTEM
Possible CausesInjectors (fuel leaks)
1
2O
3
4
IGNITION SYSTEM
Possible Causes(missing)
1
2
3
4O
INTAKE SYSTEM
Possible CausesAir cleaner element (clogged)
1O
2
3
4
CONTROL SYSTEM
Possible CausesIdle switch (remaining OFF)
1
2
3O
4
SERVICE PROCEDURE
Service Procedure Flowchart — Symptom 25
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