Ford Festiva. Instruction — part 58

IGNITION SYSTEM TROUBLE SHOOTING

Open coolant temperature sensor circuit

Test sensor and wiring

Shorted W.O.T. switch in T.P.S.

Disconnect W.O.T. switch,

engine should start

Defective ECM

Replace ECM

Fuel tank residual pressure valve leaks

Test for fuel pressure drop

after shut down

Hard Starting

Disconnected hot air tube to air cleaner

Reconnect tube and test

control valve

Defective Idle Air Control (IAC) valve

Test valve operation and

circuit

Shorted, open or misadjusted T.P.S.

Test and adjust or replace

T.P.S.

EGR valve open

Test EGR valve and control

circuit

Poor Oxygen sensor signal

Test for shorted or circuit

Incorrect mixture from PCV system

Test PCV for flow, check

sealing of oil filter cap

Poor High Speed Operation

Low fuel pump volume

Faulty pump or restricted fuel

lines or filters

Poor MAP sensor signal

Test MAP sensor, vacuum

hose and wiring

Poor Oxygen sensor signal

Test for shorted or open

sensor or circuit

Open coolant temperature sensor circuit

Test sensor and wiring

Faulty ignition operation

Check wires for cracks or poor

con- nections, test secondary

voltage with oscilloscope

Contaminated fuel

Test fuel for water or alcohol

Intermittent ECM ground

Test ECM ground connection

for resistance

Restricted air cleaner

Replace air cleaner

Restricted exhaust system

Test for exhaust manifold back

pressure

Poor MAF sensor signal

Check leakage between sensor

and manifold

Poor VSS signal

If tester for ALCL hook-up is

available check that VSS

reading matches speedometer

Ping or Knock on Acceleration

Poor Knock sensor signal

Test for shorted or open

sensor or circuit

Poor Baro sensor signal

Test for shorted or open

sensor or circuit

Improper ignition timing

See VEHICLE EMISSION

CONTROL LABEL (where

applicable)

Check for engine overheating problems

Low coolant, loose belts or

electric cooling fan inoperative

NOTE:

For additional electronic fuel injection trouble shooting information, see the appropriate article in the
ENGINE PERFORMANCE section (not all vehicles have Computer Engine Control articles). Information
is provided there for diagnosing fuel system problems on vehicles with electronic fuel injection.

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.

Fig. 3: Ignition Secondary Trouble Shooting Chart

Fig. 4: Ignition Primary Trouble Shooting Chart

STARTER TROUBLE SHOOTING

BASIC STARTER TROUBLE SHOOTING CHART

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

Starter Fails to Operate

Dead battery or bad connections between starter and battery

Check battery charge and all

wires and connections to

starter

Ignition switch faulty or misadjusted

Adjust or replace ignition

switch

Open circuit between starter switch ignition terminal on starter relay

Check and repair wires and

connections as necessary

Starter relay or starter defective

See Testing in STARTER

article

Open solenoid pull-in wire

See Testing in STARTER

article

Starter Does Not Operate and Headlights Dim

Weak battery or dead cell

Charge or replace battery as

necessary

Loose or corroded battery connections

Check that battery

connections are clean and

tight

Internal ground in starter windings

See Testing in STARTER

article

Grounded starter fields

See Testing in STARTERS

Armature rubbing on pole shoes

See STARTER article

Starter Turns but Engine Does Not Rotate

Starter clutch slipping

See STARTER article

Broken clutch housing

See STARTER article

Pinion shaft rusted or dry

See STARTER article

Engine basic timing incorrect

See Ignition Timing in

TUNE-UP article

Broken teeth on engine flywheel

Replace flywheel and check

for starter pinion gear damage

Starter Will Not Crank Engine

Faulty overrunning clutch

See STARTER article

Broken clutch housing

See STARTER article

Broken flywheel teeth

Replace flywheel and check

for starter pinion gear damage

Armature shaft sheared or reduction gear teeth stripped

See STARTER article

Weak battery

Charge or replace battery as

necessary

Faulty solenoid

See On-Vehicle Tests in

STARTER article

Poor grounds

Check all ground connections

for tight and clean

connections

Ignition switch faulty or misadjusted

Adjust or replace ignition

switch as necessary

Starter Cranks Engine Slowly

Battery weak or defective

Charge or replace battery as

necessary

Engine overheated

See ENGINE COOLING

SYSTEM article

Engine oil too heavy

Check that proper viscosity

oil is used

Poor battery-to-starter connections

Check that all between

battery and starter are clean

and tight

Current draw too low or too high

See Bench Tests in

STARTER article

Bent armature, loose pole shoes screws or worn bearings

See STARTER article

Burned solenoid contacts

Replace solenoid

Faulty starter

Replace starter

Starter Engages Engine Only Momentarily

Engine timing too far advanced

See Ignition Timing in

TUNE-UP article

Overrunning clutch not engaging properly

Replace overrunning clutch.

See STARTER article

Broken starter clutch

See STARTER article

Broken teeth on engine flywheel

Replace flywheel and check

starter pinion gear for damage

Weak drive assembly thrust spring

See STARTER article

Weak hold-in coil

See Bench Tests in

STARTER article

Starter Drive Will Not Engage

Defective point assembly

See Testing in STARTER

article

Poor point assembly ground

See Testing in STARTER

article

Defective pull-in coil

Replace starter solenoid

Starter Relay Does Not Close

Dead battery

Charge or replace battery as

necessary

Faulty wiring

Check all wiring and

connections leading to relay

Neutral safety switch faulty

Replace neutral safety switch

Starter relay faulty

Replace starter relay

Starter Drive Will Not Disengage

Starter motor loose on mountings

Tighten starter attach bolts

Worn drive end bushing

See STARTER article

Damaged engine flywheel teeth

Replace flywheel and starter

pinion gear for damage

Drive yolk return spring broken or missing

Replace return spring

Faulty ignition switch

Replace ignition switch

Insufficient clearance between winding leads to solenoid terminal and main contact in solenoid

Replace starter solenoid

Starter clutch not disengaging

Replace starter clutch

Ignition starter switch contacts sticking

Replace ignition switch

Starter Relay Operates but Solenoid Does Not