1991 FORD FESTIVA fuel cap

[x] Cancel search: fuel cap

Page 222 of 454

FORD FESTIVA 1991  Service Manual GASOLINE ENGINE - MECHANICAL TROUBLE SHOOTING 
BASIC GASOLINE ENGINE - MECHANICAL TROUBLE SHOOTING CHART 
Overheating
Coolant LeakFill/Pressure Test System
A/C Condenser Fins CloggedRemove/Clean Conde

Page 229 of 454

FORD FESTIVA 1991  Service Manual VACUUM PUMP DIAGNOSIS 
FUEL INJECTION TROUBLE SHOOTING 
BASIC FUEL INJECTION TROUBLE SHOOTING CHART 
EGR valve malfunctionReplace EGR valve
Blocked or damaged exhaust systemRemove restriction and/or

Page 230 of 454

FORD FESTIVA 1991  Service Manual IGNITION SYSTEM TROUBLE SHOOTING 
Open coolant temperature sensor circuitTest sensor and wiring
Shorted W.O.T. switch in T.P.S.Disconnect W.O.T. switch, 
engine should start
Defective ECMReplace ECM
F

Page 235 of 454

FORD FESTIVA 1991  Service Manual BASIC ELECTRONIC IGNITION TROUBLE SHOOTING CHARTS 
BASIC ELECTRONIC IGNITION TROUBLE SHOOTING CHARTS - USING OSCILLOSCOPE PATTERNS 
plug, see ENGINE 
PERFORMANCE
Chipped Insulators
Severe detonationCh

Page 236 of 454

FORD FESTIVA 1991  Service Manual BASIC DRIVEABILITY PROBLEMS TROUBLE SHOOTING 
Corroded spark plugsReplace spark plugs
Cylinders Not Firing
Cracked distributor cap terminalsReplace distributor cap
Shorted spark plug wireDetermine cau

Page 237 of 454

FORD FESTIVA 1991  Service Manual Defective distributor centrifugal advanceReplace advance mechanism
Defective distributor vacuum advanceReplace advance unit
Incorrect spark plugs or plug gapCheck gap and/or replace 
spark plugs
Fault

Page 251 of 454

FORD FESTIVA 1991  Service Manual FUEL INJECTION TROUBLE SHOOTING 
Se ve r a l  High  F ir in g Lin e s
Fuel Mixture UnbalancedCheck Fuel System
EGR Valve Stuck OpenClean/Replace EGR 
Valve
High Plug Wire ResistanceReplace Plug Wire
C

Page 264 of 454

FORD FESTIVA 1991  Service Manual  
Fig. 7: Typical Thermostatic Air Cleaner System
 
FUEL EVAPORATIVE SYSTEM (EVAP) 
The EVAP system allows for proper fuel system ventilation while preventing fuel vapors from reaching the atmosphere.
Page:   < prev 1-10 9-16 17-24 25-32 33-40 next >