ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE) 6-2-29
Improper engine
idling or engine fails
to idle
Faulty spark plug “Spark Plugs Inspection” in Section
6F2.
Leaky or disconnected high-tension cord “High-tension Cords Inspection” in Sec-
tion 6F2.
Faulty ignition coil with ignitor “Ignition Coil Assembly (Including Igni-
tor) Inspection” in Section 6F2.
Fuel pressure out of specification “Table B-3 Fuel Pressure Check” in this
section.
Leaky manifold, throttle body, or cylinder head
gasket
Malfunctioning EGR valve “EGR Valve Inspection” in Section 6E2.
Faulty idle air control system “Table B-4 Idle Air Control System
Check” in this section.
Faulty evaporative emission control system “Evaporative Emission Control System
Inspection” in Section 6E2.
Faulty EGR system “EGR Valve Inspection” in Section 6E2.
Faulty fuel injector(s) “Table B-1 Fuel Injector Circuit Check”
in this section.
Poor performance of ECT sensor, TP sensor
or MAF sensor
“TP Sensor On-Vehicle Inspection”,
“ECT Sensor Inspection” or “Mass Air
Flow (MAF) and Intake Air Temperature
(IAT) Sensor Inspection” in Section
6E2.
Faulty ECM
Loose connection or disconnection of vacuum
hoses
Malfunctioning PCV valve “PCV System Inspection” in Section
6E2.
Engine overheating “Overheating” in this section.
Low compression “Compression Check” in Section 6A2.
VVT system out of order “Oil Control Valve Inspection” in Section
6E2.
Condition Possible Cause Reference Item
To Next Page
Loading...
