Trouble Diagnoses — Diagnostic Table (Cont'd) — Symptom & Condition 16: Poor driveability — lack of power
EF & EC-54flowchartDiagnostic Table (Cont'd)
SYMPTOM & CONDITION 16 — Poor driveability — lack of power
Possible Causes vs. Check Numbers
| Category | Possible Causes | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|
| SPECIFICATIONS | Fuel pressure | O | O | |||||||
| SPECIFICATIONS | Ignition timing | O | ||||||||
| SPECIFICATIONS | Compression pressure (too low) | O | ||||||||
| FUEL SYSTEM | Fuel pump (low fuel output) | O | ||||||||
| FUEL SYSTEM | Fuel filter (clogged) | O | ||||||||
| FUEL SYSTEM | Fuel line (clogged) | O | ||||||||
| FUEL SYSTEM | Injectors (clogged) | O | ||||||||
| IGNITION SYSTEM | Spark plugs (improper gap) | O | ||||||||
| INTAKE SYSTEM | Air cleaner element (clogged) | O | ||||||||
| INTAKE SYSTEM | Throttle chamber (clogged) | O | ||||||||
| INTAKE SYSTEM | Throttle valve (not open enough) | O | ||||||||
| CONTROL SYSTEM | Air flow meter | O | ||||||||
| CONTROL SYSTEM | Exhaust gas sensor | O |
SPECIFICATIONS
Possible CausesFuel pressure
1
2
3
4
5
6O
7O
8
9
SPECIFICATIONS
Possible CausesIgnition timing
1
2O
3
4
5
6
7
8
9
SPECIFICATIONS
Possible CausesCompression pressure (too low)
1
2
3
4
5O
6
7
8
9
FUEL SYSTEM
Possible CausesFuel pump (low fuel output)
1
2
3
4
5
6
7O
8
9
FUEL SYSTEM
Possible CausesFuel filter (clogged)
1
2
3
4
5
6
7O
8
9
FUEL SYSTEM
Possible CausesFuel line (clogged)
1
2
3
4
5
6
7O
8
9
FUEL SYSTEM
Possible CausesInjectors (clogged)
1
2
3
4
5
6
7O
8
9
IGNITION SYSTEM
Possible CausesSpark plugs (improper gap)
1
2
3
4O
5
6
7
8
9
INTAKE SYSTEM
Possible CausesAir cleaner element (clogged)
1O
2
3
4
5
6
7
8
9
INTAKE SYSTEM
Possible CausesThrottle chamber (clogged)
1
2
3O
4
5
6
7
8
9
INTAKE SYSTEM
Possible CausesThrottle valve (not open enough)
1
2
3O
4
5
6
7
8
9
CONTROL SYSTEM
Possible CausesAir flow meter
1
2
3
4
5
6
7
8O
9
CONTROL SYSTEM
Possible CausesExhaust gas sensor
1
2
3
4
5
6
7
8
9O
SERVICE PROCEDURE
Service Procedure — Poor driveability — lack of power
Rendering diagram…