Ford Festiva. Manual — part 57
ENGINE PERFORMANCE
CARBURETOR TROUBLE SHOOTING:
BASIC COLD START SYMPTOMS TROUBLE SHOOTING CHART
BASIC HOT START SYMPTOMS TROUBLE SHOOTING CHART
BASIC COLD ENGINE DRIVEABILITY SYMPTOMS TROUBLE SHOOTING CHART
Improper connecting rod alignment
Remove and realign
connecting rods
Excessively worn ring grooves
Replace pistons, See
ENGINES
Improperly assembled piston pins
Re-assemble pin-to-piston,
See ENGINES
Insufficient ring gap clearance
Install new rings, See
ENGINES
Engine overheating
Check cooling system
Incorrect ignition timing
Re-adjust ignition timing, See
TUNE-UP
Excessive Exhaust Noise
Leaks at manifold to head, or to pipe
Replace manifold or pipe
gasket
Exhaust manifold cracked or broken
Replace exhaust manifold, See
ENGINES
NOTE:
This is GENERAL information. This article is not intended to be specific to any unique situation or
individual vehicle configuration. The purpose of this Trouble Shooting information is to provide a list
of common causes to problem symptoms. For model-specific Trouble Shooting, refer to SUBJECT,
DIAGNOSTIC, or TESTING articles available in the section(s) you are accessing.
CONDITION & POSSIBLE CAUSE
CORRECTION
Engine Won't Start
Choke not closing
Check choke operation, see
FUEL SYSTEMS
Choke linkage bent
Check linkage, see FUEL
SYSTEM
Engine Starts, Then Dies
Choke vacuum kick setting too wide
Check setting and adjust see,
FUEL SYSTEMS
Fast idle RPM too low
Reset RPM to specification,
see TUNE-UP
Fast idle cam index incorrect
Reset fast idle cam index, see
FUEL SYSTEMS
Vacuum leak
Inspect vacuum system for
leaks
Low fuel pump outlet
Repair or replace pump, see
FUEL SYSTEMS
Low carburetor fuel level
Check float setting see FUEL
SYSTEM
Engine Quits Under Load
Choke vacuum kick setting incorrect
Reset vacuum kick setting,see
FUEL SYSTEMS
Fast idle cam index incorrect
Reset fast idle cam index, see
FUEL SYSTEM
Incorrect hot fast idle speed RPM
Reset fast idle RPM, see
TUNE-UP
Engine Starts, Runs Up, Then Idles, Slowly With Black Smoke
Choke vacuum kick set too narrow
Reset vacuum kick, see FUEL
SYSTEMS
Fast idle cam index incorrect
Reset fast idle cam index, see
FUEL SYSTEMS
Hot fast idle RPM too low
Reset fast idle RPM, see
TUNE-UP
CONDITION & POSSIBLE CAUSE
CORRECTION
Engine Won't Start
Engine flooded
Allow fuel to evaporate
CONDITION & POSSIBLE CAUSE
CORRECTION
Engine Stalls in Gear
Choke vacuum kick setting incorrect
Reset choke vacuum kick, see
FUEL SYSTEMS
Fast idle RPM incorrect
Reset fast idle RPM, see
TUNE-UP
Fast idle cam index incorrect
Reset fast idle cam see FUEL
BASIC WARM ENGINE DRIVEABILITY SYMPTOMS TROUBLE SHOOTING CHART
DIESEL ENGINE TROUBLE SHOOTING
BASIC DIESEL ENGINE TROUBLE SHOOTING CHART
SYSTEMS
Acceleration Sag or Stall
Defective choke control switch
Replace choke control switch
Choke vacuum kick setting incorrect
Reset choke vacuum kick see,
FUEL SYSTEMS
Float level incorrect (too low)
Adjust float level, FUEL
SYSTEMS
Accelerator pump defective
Repair or replace pump see
FUEL SYSTEMS
Secondary throttles not closed
Inspect lockout adjustment,
see FUEL SYSTEMS
Sag or Stall After Warmup
Defective choke control switch
Replace choke control switch,
see FUEL SYSTEMS
Defective accelerator pump
Replace pump, see FUEL
SYSTEMS
Float level incorrect (too low)
Adjust float level, see FUEL
SYSTEMS
Backfiring & Black Smoke
Plugged heat crossover system
Remove restriction
CONDITION & POSSIBLE CAUSE
CORRECTION
Hesitation With Small Amount of Gas Pedal Movement
Vacuum leak
Inspect vacuum lines
Accelerator pump weak or inoperable
Replace pump, see FUEL
SYSTEMS
Float level setting too low
Reset float level, see,FUEL
SYSTEMS
Metering rods sticking or binding
Inspect and/or replace rods,
see FUEL SYSTEMS
Carburetor idle or transfer system plugged
Inspect system and remove
restriction
Frozen or binding heated air inlet
Inspect heated air door for
binding
Hesitation With Heavy Gas Pedal Movement
Defective accelerator pump
Replace pump, see FUEL
SYSTEMS
Metering rod carrier sticking or binding
Remove restriction
Large vacuum leak
Inspect vacuum system and
repair leak
Float level setting too low
Reset float level, see FUEL
SYSTEMS
Defective fuel pump, lines or filter
Inspect pump, lines and filter
Air door setting incorrect
Adjust air door setting, see
FUEL
NOTE:
This is GENERAL information. This article is not intended to be specific to any unique situation or
individual vehicle configuration. The purpose of this Trouble Shooting information is to provide a list
of common causes to problem symptoms. For model-specific Trouble Shooting, refer to SUBJECT,
DIAGNOSTIC, or TESTING articles available in the section(s) you are accessing.
NOTE:
Diesel engines mechanical diagnosis is the same as gasoline engines for items such as noisy valves,
bearings, pistons, etc. The following trouble shooting covers only items pertaining to diesel engines.
CONDITION & POSSIBLE CAUSE
CORRECTION
Engine Won't Crank
Bad battery connections or dead batteries
Check connections and/or
replace batteries
Bad starter connections or bad starter
Check connections and/or
replace starter
Engine Cranks Slowly, Won't Start
Bad battery connections or dead batteries
Check connections and/or
replace batteries
Engine oil too heavy
Replace engine oil
Engine Cranks Normally, But Will Not Start
Glow plugs not functioning
Check glow plug system, see
FUEL SYSTEMS
Glow plug control not functioning
Check controller, see FUEL
SYSTEMS
Fuel not injected into cylinders
Check fuel injectors, see FUEL
SYSTEMS
No fuel to injection pump
Check fuel delivery system
Fuel filter blocked
Replace fuel filter
Fuel tank filter blocked
Replace fuel tank filter
Fuel pump not operating
Check pump operation and/or
replace pump
Fuel return system blocked
Inspect system and remove
restriction
No voltage to fuel solenoid
Check solenoid and
connections
Incorrect or contaminated fuel
Replace fuel
Incorrect injection pump timing
Re-adjust pump timing, see
FUEL SYSTEMS
Low compression
Check valves, pistons, rings,
see ENGINES
Injection pump malfunction
Inspect and/or replace
injection pump
Engine Starts, Won't Idle
Incorrect slow idle adjustment
Reset idle adjustment, see
TUNE-UP
Fast idle solenoid malfunctioning
Check solenoid and
connections
Fuel return system blocked
Check system and remove
restrictions
Glow plugs go off too soon
See glow plug diagnosis in
FUEL SYSTEMS
Injection pump timing incorrect
Reset pump timing, see FUEL
SYSTEMS
No fuel to injection pump
Check fuel delivery system
Incorrect or contaminated fuel
Replace fuel
Low compression
Check valves, piston, rings, see
ENGINES
Injection pump malfunction
Replace injection pump, see
FUEL SYSTEMS
Fuel solenoid closes in RUN position
Check solenoid and
connections
Engines Starts/Idles Rough W/out Smoke or Noise
Incorrect slow idle adjustment
Reset slow idle, see TUNE-UP
Injection line fuel leaks
Check lines and connections
Fuel return system blocked
Check lines and connections
Air in fuel system
Bleed air from system
Incorrect or contaminated fuel
Replace fuel
Injector nozzle malfunction
Check nozzles, see FUEL
SYSTEMS
Engines Starts and Idles Rough W/out Smoke or Noise, But Clears After Warm-Up
Injection pump timing incorrect
Reset pump timing, see FUEL
SYSTEMS
Engine not fully broken in
Put more miles on engine
Air in system
Bleed air from system
Injector nozzle malfunction
Check nozzles, see FUEL
SYSTEMS
Engine Idles Correctly, Misfires Above Idle
Blocked fuel filter
Replace fuel filter
Injection pump timing incorrect
Reset pump timing, see FUEL
SYSTEMS
Incorrect or contaminated fuel
Replace fuel
Engine Won't Return To Idle
Fast idle adjustment incorrect
Reset fast idle, see TUNE-UP
Internal injection pump malfunction
Replace injection pump, see
FUEL SYSTEMS
External linkage binding
Check linkage and remove
binding
Fuel Leaks On Ground
Loose or broken fuel line
Check lines and connections
Internal injection pump seal leak
Replace injection pump, see
FUEL SYSTEMS
Cylinder Knocking Noise
Injector nozzles sticking open
Test injectors, see FUEL
SYSTEMS
Very low nozzle opening pressure
Test injectors and/or replace
Loss of Engine Power
Restricted air intake
Remove restriction
VACUUM PUMP DIAGNOSIS
FUEL INJECTION TROUBLE SHOOTING
BASIC FUEL INJECTION TROUBLE SHOOTING CHART
EGR valve malfunction
Replace EGR valve
Blocked or damaged exhaust system
Remove restriction and/or
replace components
Blocked fuel tank filter
Replace filter
Restricted fuel filter
Remove restriction and/or
replace filter
Block vent in gas cap
Remove restriction and/or
replace cap
Tank-to-injection pump fuel supply blocked
Check fuel lines and
connections
Blocked fuel return system
Remove restriction
Incorrect or contaminated fuel
Replace fuel
Blocked injector nozzles
Check nozzle for blockage, see
FUEL SYSTEMS
Low compression
Check valves, rings, pistons,
see ENGINES
Loud Engine Noise With Black Smoke
Basic timing incorrect
Reset timing, see FUEL
SYSTEMS
EGR valve malfunction
Replace EGR valve
Internal injection pump malfunction
Replace injection pump, see
FUEL SYSTEMS
Incorrect injector pump housing pressure
Check pressure, see FUEL
SYSTEMS
Engine Overheating
Cooling system leaks
Check cooling system and
repair leaks
Belt slipping or damaged
Check tension and/or replace
belt
Thermostat stuck closed
Remove and replace
thermostat, see ENGINE
COOLING
Head gasket leaking
Replace head gasket
Oil Light on at Idle
Low oil pump pressure
Check oil pump operation, see
ENGINES
Oil cooler or line restricted
Remove restriction and/or
replace cooler
Engine Won't Shut Off
Injector pump fuel solenoid does not return fuel valve to OFF position
Remove and check solenoid
and replace if needed
CONDITION & POSSIBLE CAUSE
CORRECTION
Excessive Noise
Loose pump-to-drive assembly screws
Tighten screws
Loose tube on pump assembly
Tighten tube
Valves not functioning properly
Replace valves
Oil Leakage
Loose end plug
Tighten end plug
Bad seal crimp
Remove and re-crimp seal
NOTE:
This is GENERAL information. This article is not intended to be specific to any unique situation or
individual vehicle configuration. The purpose of this Trouble Shooting information is to provide a list
of common causes to problem symptoms. For model-specific Trouble Shooting, refer to SUBJECT,
DIAGNOSTIC, or TESTING articles available in the section(s) you are accessing.
CONDITION & POSSIBLE CAUSE
CORRECTION
Engine Won't Start (Cranks Normally)
Cold start valve inoperative
Test valve and circuit
Poor connection;vacuum or wiring
Check vacuum and electrical
connections
Contaminated fuel
Test fuel for water or alcohol
Defective fuel pump relay or circuit
Test relay and wiring
Battery too low
Charge and test battery
Low fuel pressure
Test pressure regulator and
fuel pump, check for restricted
lines and filters
No distributor reference pulses
Repair ignition system as
necessary
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