Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
EM15 CHECK THE BASE ENGINE
Is a concern present?
Yes | No |
|---|---|
REPAIR as necessary. After any repair, GO to EM26 . | GO to EM27 . |
EM16 HIGH HC WITH A NORMAL TO LOW CO LEVEL
• Check the fuel delivery system for concerns. GO to Pinpoint Test HC and follow the pinpoint test direction.
Is a concern present?
Yes | No |
|---|---|
FOLLOW the pinpoint test direction. After any repair, GO to EM26 . | GO to EM17 . |
EM17 CHECK THE SECONDARY IGNITION
• For ignition coil on plug (COP) equipped vehicles, GO to JB3 and follow the pinpoint test direction.
• For ignition coil pack equipped vehicles, GO to JC3 and follow the pinpoint test direction.
Is a concern present?
Yes | No |
|---|---|
FOLLOW the pinpoint test direction. After any repair, GO to EM26 . | GO to EM18 . |
EM18 CHECK FOR VACUUM LEAKS OR OBSTRUCTIONS IN THE PCV SYSTEM (SUCH AS OIL CAP, PCV VALVE, HOSES, CUT GROMMETS, VALVE COVER BOLT TORQUE OR GASKET LEAK)
• GO to HG2 and follow the pinpoint test direction.
Is a concern present?
Yes | No |
|---|---|
FOLLOW the pinpoint test direction. | GO to EM19 . |
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.