TROUBLE DIAGNOSES — Diagnostic Table (Cont'd) — Symptom & Condition 17: Poor driveability — detonation
EF & EC-55flowchartDiagnostic Table (Cont'd)
SYMPTOM & CONDITION 17 — Poor driveability — detonation
Possible Causes and Check Step Matrix
SPECIFICATIONS
Possible CausesMixture ratio (too lean)
①
②
③O
④O
⑤
SPECIFICATIONS
Possible CausesFuel pressure (low)
①
②
③O
④
⑤
SPECIFICATIONS
Possible CausesIgnition timing (too advanced)
①
②O
③
④
⑤
FUEL SYSTEM
Possible CausesFuel filter (clogged)
①
②
③
④O
⑤
FUEL SYSTEM
Possible CausesFuel line (clogged)
①
②
③
④O
⑤
FUEL SYSTEM
Possible CausesInjectors (clogged)
①
②
③
④O
⑤
CONTROL SYSTEM
Possible CausesCrank angle sensor (improper 1° signals)
①
②
③
④
⑤O
CONTROL SYSTEM
Possible CausesAir flow meter
①
②
③
④
⑤O
CONTROL SYSTEM
Possible CausesEngine temperature sensor
①
②
③
④
⑤O
OTHERS
Possible CausesEngine coolant temperature (too high)
①O
②
③
④
⑤
OTHERS
Possible CausesFuel (low octane rating, poor quality)
①
②
③
④
⑤
SERVICE PROCEDURE
Service Procedure Flowchart — Symptom 17
Rendering diagram…
See also
LC sectionEF & EC-22Direct Ignition System (Cont'd) — Checking Ignition Timing and Idle SpeedEF & EC-82Diagnostic Procedure 2 — CRANK ANGLE SENSOR (Code No. 11)EF & EC-84TROUBLE DIAGNOSES — Diagnostic Procedure 3 — AIR FLOW METER (Code No. 12)EF & EC-86Diagnostic Procedure 4 — ENGINE TEMPERATURE SENSOR (Code No. 13)