TROUBLE DIAGNOSES — Diagnostic Table (Cont'd) — Symptom & Condition 15: Poor driveability — surge (while cruising)
EF & EC-53flowchartDiagnostic Table (Cont'd)
SYMPTOM & CONDITION 15 | Poor driveability — surge (while cruising)
Possible Causes vs. Check Steps
| Category | POSSIBLE CAUSES | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|---|
| SPECIFICATIONS | Mixture ratio (too lean) | O | O | O | O | |||
| SPECIFICATIONS | Fuel pressure (low) | O | O | |||||
| SPECIFICATIONS | Ignition timing | O | ||||||
| IGNITION SYSTEM | (missing) | O | ||||||
| INTAKE SYSTEM | Air duct (leaks) | O | ||||||
| INTAKE SYSTEM | Throttle chamber (air leaks) | O | ||||||
| INTAKE SYSTEM | Intake manifold (gasket) (air leaks) | O | ||||||
| CONTROL SYSTEM | Crank angle sensor | O | ||||||
| CONTROL SYSTEM | Air flow meter | O | ||||||
| CONTROL SYSTEM | Exhaust gas sensor | O | ||||||
| CONTROL SYSTEM | Idle switch | O |
SPECIFICATIONS
POSSIBLE CAUSESMixture ratio (too lean)
1O
2
3O
4O
5
6
7O
SPECIFICATIONS
POSSIBLE CAUSESFuel pressure (low)
1
2
3O
4O
5
6
7
SPECIFICATIONS
POSSIBLE CAUSESIgnition timing
1
2O
3
4
5
6
7
IGNITION SYSTEM
POSSIBLE CAUSES(missing)
1
2
3
4
5
6O
7
INTAKE SYSTEM
POSSIBLE CAUSESAir duct (leaks)
1O
2
3
4
5
6
7
INTAKE SYSTEM
POSSIBLE CAUSESThrottle chamber (air leaks)
1O
2
3
4
5
6
7
INTAKE SYSTEM
POSSIBLE CAUSESIntake manifold (gasket) (air leaks)
1O
2
3
4
5
6
7
CONTROL SYSTEM
POSSIBLE CAUSESCrank angle sensor
1
2
3
4
5
6O
7
CONTROL SYSTEM
POSSIBLE CAUSESAir flow meter
1
2
3
4
5
6O
7
CONTROL SYSTEM
POSSIBLE CAUSESExhaust gas sensor
1
2
3
4
5
6
7O
CONTROL SYSTEM
POSSIBLE CAUSESIdle switch
1
2
3
4
5O
6
7
SERVICE PROCEDURE
Service Procedure Flowchart — Symptom 15
Rendering diagram…