Ford Festiva. Manual — part 40

Fig. 2: Capri Fuel System Electrical Schematic

Courtesy of FORD MOTOR CO.

Fuel Pump Relay

Remove fuel pump relay (located near heater duct under carpet). Apply positive 12 volts to relay terminals "A" and "B" together. See

Fig. 3

.

Measure voltage between terminal "C" and ground, while individually grounding terminals "D" and "E". Ensure voltage is as specified. See

FUEL PUMP RELAY SPECIFICATIONS

table. If voltage is not as specified, replace relay.

FUEL PUMP RELAY SPECIFICATIONS

Fig. 3: Identifying Fuel Pump Relay Terminals

Courtesy of FORD MOTOR CO.

IGNITION CHECKS

Firing Order

Inspect spark plug wiring routing. Ensure firing order is 1-3-4-2.

Spark

1. Crank engine. Check for a strong Blue spark at each spark plug wire by using a high output spark tester. Ensure resistance of each spark

plug wire is 4000-6000 ohms per foot.

2. Disconnect and inspect all related ignition system connectors and harness. Clean or repair as necessary, and recheck spark. If still no

spark, go to

IGNITION COIL POWER SOURCE

.

Ignition Coil Power Source

Disconnect primary wires at ignition coil. Turn ignition on. Measure voltage between Black/White wire on harness connector and ground. If
voltage is not greater than 10 volts, check battery feed, ignition switch and fusible links. If voltage is greater than 10 volts, go to

IGNITION

COIL RESISTANCE

.

Ignition Coil Resistance

Measure resistance between primary terminals of coil. Measure resistance between positive primary terminal and coil tower. See

IGNITION

COIL RESISTANCE

table. Verify resistance between coil case and primary positive terminal is infinite. Replace coil if resistance

measurements are not within specifications.

IGNITION COIL RESISTANCE

IDLE SPEED & IGNITION TIMING

Ensure idle speed and ignition timing are set to specification. For adjustment procedures, see ON-VEHICLE ADJUSTMENTS article.

SUMMARY

If no faults were found while performing BASIC TESTING , proceed to TESTS W/CODES article in the ENGINE PERFORMANCE Section.
If no hard codes are found in self-diagnostics, proceed to TESTS W/O CODES article in the ENGINE PERFORMANCE Section for diagnosis
by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.

Terminal "D"

Terminal "E"

Terminal "C" Voltage

Open

Open

Less than one

Grounded

Open

Less than 10

Open

Grounded

Greater than 10

Grounded

Grounded

Greater than 10

Application

Primary (Ohms)

Secondary (Ohms)

1.3L & 1.6L

0.8-1.6

6000-30,000

Copyright 2009 Mitchell Repair Information Company, LLC. All Rights Reserved.

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P - EGR FUNCTION TESTING

1989-95 ENGINE PERFORMANCE Ford Motor Co. EGR Function Testing

TESTING

EGR VALVE

1989 Merkur & 1991-95 Escort/Tracer 1.9L (Ported EGR Valve)

1. Check vacuum lines for correct routing. Ensure no vacuum is available to EGR valve with engine idling. Disconnect idle air by-pass

valve connector.

2. Disconnect vacuum hose at EGR valve and plug hose end. Connect a vacuum pump to EGR valve. Start engine. Apply 5-10 in. Hg to

vacuum hose. If idle becomes unstable or engine stalls, EGR valve is functioning properly.

3. Reconnect idle air by-pass connector. Connect a vacuum pump to EGR vacuum supply hose. Ensure engine is at normal operating

temperature. Increase engine speed 1500-2000 RPM. Vacuum gauge should read more than 5 in. Hg. If system operates as indicated,
system is functioning properly.

1988-89 Festiva & Tracer (Ported EGR Valve)

1. Ensure engine is at normal operating temperature. Check vacuum lines for correct routing. Ensure no vacuum is available to EGR valve

with engine idling. Start engine. Place finger against EGR diaphragm. Increase engine RPM. Diaphragm should move.

2. Remove EGR vacuum supply hose from EGR valve and plug hose end. Connect a vacuum pump to EGR valve. With engine idling,

apply 6 in. Hg to EGR valve. If vacuum holds and idle becomes unstable or engine stalls, EGR valve is functioning properly.

Copyright 2009 Mitchell Repair Information Company, LLC. All Rights Reserved.

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I - SYSTEM/COMPONENT TESTS

1991 ENGINE PERFORMANCE Ford Motor Co. - Ford/Mercury System & Component Testing

INTRODUCTION

Before testing separate components or systems, perform procedures in BASIC TESTING article in the ENGINE PERFORMANCE Section.
Since many computer-controlled and monitored components set a trouble code if they malfunction, also perform procedures in TESTS
W/CODES article in the ENGINE PERFORMANCE Section.

AIR INDUCTION SYSTEMS

TURBOCHARGERS

Wastegate Actuator

Disconnect air hose from wastegate actuator. Apply 7.0-8.6 psi (.5-.6 kg/cm

2

) regulated air pressure to wastegate inlet fitting. Replace

turbocharger if wastegate actuator rod does not move.

COMPUTERIZED ENGINE CONTROLS

ELECTRONIC CONTROL ASSEMBLY (ECA)

Ground Circuits

Turn ignition off. Connect BOB, leaving ECA disconnected. Measure resistance between each specified BOB pin and ground. See ECA
GROUND CIRCUIT RESISTANCE table. Repair indicated ECA ground circuit if resistance is greater than 5 ohms.

ECA GROUND CIRCUIT RESISTANCE

Power Circuits

Turn ignition off. Connect BOB, leaving ECA disconnected. Turn ignition on. Repair indicated ECA power circuit if battery voltage does not
appear on specified BOB pin. See

ECA POWER CIRCUITS RESISTANCE

.

ECA POWER CIRCUIT RESISTANCE

ENGINE SENSORS & SWITCHES

Check each component and all related wiring for any looseness or damage. Make all resistance and voltage measurements using Breakout Box
(BOB) unless specified otherwise.

BAROMETRIC PRESSURE SENSOR (1.3L)

This unit is incorporated into the ECA, and cannot be checked or serviced separately. If a Code 14 is set and cannot be cleared, replace the
ECA.

BAROMETRIC PRESSURE (BP) SENSOR (1.6L)

NOTE:

Testing individual components does not isolate shorts or opens. Perform all voltage tests with a Digital
Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test
procedure. Use ohmmeter and Breakout Box (BOB) (007-00033) to isolate wiring harness shorts or
opens.

ECA Pin

BOB Pin

Wire Color

1.3L

2A

39,40,44

Black

2B

20

Black

2C

16

Black

2D

46,49

Black

2J

(2)

(3)

6

(3)

White/Red

2J

(4)

6

Black

1.6L

2R

49

Black

3A

(1)

(1)

20

Black

3G

(1)

(1)

40

Black

(1)

Turbo only.

(2)

A/T models only.

(3)

No continuity on A/T models.

(4)

M/T models only.

ECA Pin

BOB Pin

Wire Color

1.3L: 1A

1

White/Red

1.6L: 3J

1

Black/Red