TROUBLESHOOTING GUIDE — 6 CRANKS NORMALLY BUT HARD TO START — WHEN ENGINE IS COLD
F-28spec table6 CRANKS NORMALLY BUT HARD TO START — WHEN ENGINE IS COLD
DESCRIPTION: Engine cranks at normal speed but requires excessive cranking time before starting. Battery in normal condition. Restarts OK after warm-up.
NOTE
[TROUBLESHOOTING HINTS] (1) Air/Fuel mixture too rich: Airflow meter stuck; Air cleaner element clogged; Idle speed control malfunction. (2) Air/Fuel mixture too lean: Fuel injection control malfunction (Correction for coolant temperature). (3) Poor atomization of fuel: Low RVP (summer) fuel used in cold weather.
Troubleshooting steps 1-6
1
INSPECTIONCheck if '00' is displayed on Self-Diagnosis Checker with ignition switch ON — page F-78
RESULTYes
ACTIONGo to next step
1
INSPECTIONCheck if '00' is displayed on Self-Diagnosis Checker with ignition switch ON — page F-78
RESULTNo
ACTIONMalfunction Code No. displayed: Check for cause (Refer to specified check sequence) — page F-80. "88" flashes: Check ECU terminal 1F voltage — page F-128; Voltage: Approx. 12V (Ignition switch ON); If OK, replace ECU — page F-127; If not OK, check wiring between ECU and Self-Diagnosis Checker — page F-7
2
INSPECTIONCheck if ECU terminal voltages are OK (1C, 2D, 2O and 2Q) — page F-129
RESULTYes
ACTIONGo to next step
2
INSPECTIONCheck if ECU terminal voltages are OK (1C, 2D, 2O and 2Q) — page F-129
RESULTNo
ACTIONCheck for cause (Refer to "Check Point for Each Terminal") — page F-131
3
INSPECTIONCheck if engine starts easily when depressing accelerator while cranking
RESULTYes
ACTIONCheck if ISC valve is OK — page F-99; If OK, check air valve — page F-99; If not OK, replace ISC valve — page F-99
3
INSPECTIONCheck if engine starts easily when depressing accelerator while cranking
RESULTNo
ACTIONGo to next step
4
INSPECTIONCheck for correct intake manifold vacuum at idle; Vacuum: More than 450 mmHg (17.7 inHg)
RESULTYes
ACTIONGo to next step
4
INSPECTIONCheck for correct intake manifold vacuum at idle; Vacuum: More than 450 mmHg (17.7 inHg)
RESULTNo
ACTIONCheck for air leakage of intake air system components — page F-93
5
INSPECTIONCheck if air cleaner element is clean — page F-75
RESULTYes
ACTIONGo to next step
5
INSPECTIONCheck if air cleaner element is clean — page F-75
RESULTNo
ACTIONReplace air cleaner element — page F-92
6
INSPECTIONTry known good ECU and check if condition improves — page F-127
RESULTYes
ACTIONReplace ECU
6
INSPECTIONTry known good ECU and check if condition improves — page F-127
RESULTNo
ACTIONChange fuel to another brand
See also
F-78SELF-DIAGNOSIS FUNCTIONF-80SELF-DIAGNOSIS FUNCTIONF-128CONTROL SYSTEM - Engine Control Unit Terminal Voltage TableF-127CONTROL SYSTEM - Engine Control Unit InspectionF-7OUTLINE - WIRING DIAGRAMF-129CONTROL SYSTEM - Engine Control Unit Terminal Voltage Table (continued)F-131CONTROL SYSTEM - Check Point for Each TerminalF-99IDLE SPEED CONTROL (ISC) SYSTEMF-93INTAKE AIR SYSTEMF-75ENGINE TUNE-UPF-92INTAKE AIR SYSTEM