Burnt valve INSTALL a new cylinder head. TEST the
system for normal operation after the repair.
Worn piston INSTALL a new piston. TEST the system for
normal operation after the repair.
Worn piston rings INSTALL new piston rings. TEST the system
for normal operation after the repair.
Worn cylinder INSTALL a new cylinder block. TEST the
system for normal operation after the repair.
Damaged head gasket INSTALL a new cylinder head gasket. TEST
the system for normal operation after the repair.
Inoperative or damaged Refer to the appropriate section in Group cooling system 303 for the procedure.
Fail-safe cooling invoked (if Refer to Powertrain Control/Emissions equipped) Diagnosis (PC/ED) manual.
Poor idling Vacuum leaks Refer to the appropriate section in Group
Inoperative or damaged 303 for the procedure. Refer to Powertrain EGR system Control/Emissions Diagnosis (PC/ED)
manual.
Inoperative or damaged Refer to the appropriate section in Group ignition system 303 for the procedure.
Inoperative or damaged Refer to the appropriate section in Group cooling system 303 for the procedure. Inoperative or damaged fuel system
Fail-safe cooling invoked (if Refer to Powertrain Control/Emissions equipped) Diagnosis (PC/ED) manual.
Incorrect valve clearance ADJUST valve clearance. Refer to the
appropriate section in Group 303 for the procedure. TEST the system for normal operation after the repair.
Incorrect valve-to-valve seat INSTALL a new cylinder head. TEST the contact system for normal operation after the repair.
Damaged head gasket INSTALL a new cylinder head gasket. TEST
the system for normal operation after the repair.
Engine runs rough Inoperative or damaged fuel Refer to the appropriate section in Group
system 303 for the procedure. Air or vacuum leaks EGR system fault Inoperative or damaged cooling system Inoperative or damaged ignition system
Fail-safe cooling invoked (if Refer to Powertrain Control/Emissions equipped) Diagnosis (PC/ED) manual.
Burnt or sticking valve INSTALL a new valve. TEST the system for
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.