1991 FORD FESTIVA oil pressure

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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 239 of 454

FORD FESTIVA 1991  Service Manual POWERTRAIN 
CLUTCH TROUBLE SHOOTING 
BASIC CLUTCH TROUBLE SHOOTING CHART 
Gear Clash When Shifting Forward GearsClutch Out Of Adjustment, Shift linkage damaged or out of 
adjustment, Gears or synchron

Page 240 of 454

FORD FESTIVA 1991  Service Manual DRIVE AXLE - NOISE DIAGNOSIS 
Unrelated Noises 
Some driveline trouble symptoms are also common to the engine, transmission, wheel bearings, tires, and other parts of the vehicle. Ensure 
cause of tro

Page 245 of 454

FORD FESTIVA 1991  Service Manual Ties rods or ball joints bindingCheck and replace if necessary
Intermediate shaft joints bindingSee STEERING COLUMN 
article
Kinked pressure hosesCorrect or replace if necessary
Loose housing head spa

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 257 of 454

FORD FESTIVA 1991  Service Manual Back To Article 
GENERAL INFORMATION 
Clutch Trouble Shooting 
* PLEASE READ THIS FIRST * 
ALL MODELS 
CLUTCH TROUBLE SHOOTING  NOTE:This is GENERAL inform ation. This article is not intended to be sp

Page 274 of 454

FORD FESTIVA 1991  Service Manual Back To Article 
GENERAL INFORMATION 
Engine Perform ance Safety Precautions 
Always refer to Emission Decal in engine compartment before servicing vehicle. If manual and decal differ, always use d