Spark plug FORD FESTIVA 1991 Service Manual

1. Position new gasket on exhaust manifold, and install turbocharger onto studs. Install 4 retaining nuts and tighten to specification. See
TORQUE SPECIFICATIONS
table at end of article.
2. Remove oil supply line from turbocharger. Position new (2-piece) exhaust gasket on cylinder head with heavy gasket installed first .
Carefully position turbocharger assembly in engine compartment and slide exhaust manifold on studs. Position heater tube bracket onto
exhaust stud. Install 11 retaining nuts onto exhaust manifold and tighten to specification. See TORQUE SPECIFICATIONS
table at
end of article. Tighten heater tube clamp bolt securely.
3. Raise vehicle. Position new gasket and install 2 retaining bolts on heater tube outlet. Install 2 retaining bolts into turbocharger support
bracket and tighten bolts to specification.
4. Connect coolant return hose. Connect oil return hose and secure with clamp. Position exhaust pipe onto turbocharger, and start nuts
and washers. Install 2 retaining bolts on exhaust hanger at engine. Slide on 2 rubber exhaust hangers at catalytic converter. Tighten
exhaust pipe retaining nuts to specification. Lower vehicle.
5. Install retaining bolt and brass washers on oil supply line, carefully position oil line into vehicle and hand-start bolt into engine block.
Connect and finger tighten oil line to turbocharger. Tighten oil line bolt and oil supply line on turbocharger to specification.
6. Connect coolant supply hose. Position air cleaner duct tube on turbocharger and tighten clamp. Install 2 screws retaining air cleaner
duct tube. Position power steering pump bracket on engine, and install 2 retaining bolts and one retaining nut. Tighten to specification.
Position power steering pump on mounting bracket, and install though bolt and adjuster. Connect lower radiator hose. Install power
steering belt. Position upper heat shield and install 2 retaining bolts finger tight.
7. Position lower heat shield and install three retaining bolts finger tight. Tighten all heat shield bolts to specification. Connect O2 sensor
and install connector into its retaining clip. See TORQUE SPECIFICATIONS
table at end of article. Position intercooler hose on
turbocharger and secure with clamp. Install throttle body air intake tube. Connect negative battery cable. Refill cooling system.
CYLINDER HEAD
Removal (1.3L)
1. Disconnect battery ground cable. Mark and disconnect fuel lines at fuel pump. Remove accessory belts, water pump pulley, crankshaft
pulley, timing belt covers, timing belt tensioner, timing belt, valve cover and exhaust and intake manifolds. Drain cooling system.
2. Mark and remove electrical connectors and vacuum hoses. Remove spark plug wires from spark plugs, and remove spark plugs. Remove
distributor cap. Disconnect vacuum hoses and distributor wiring.
3. Index distributor-to-mount position and remove hold-down bolt. Remove distributor assembly. Remove engine ground strap. Remove
front and rear engine lifting hooks. Remove upper radiator hose, by-pass hose and bracket.
4. Remove bolts retaining rocker arm shaft. Remove rocker arm assemblies. Remove cylinder head bolts. Remove head and gasket.
Inspection (1.3L)
1. Thoroughly clean and check gasket mating surface of cylinder head and block. Check cylinder for cracks, nicks, burrs or damage. Using
a straightedge and feeler gauge, check warpage over entire gasket area. Ensure cylinder head and/or block warpage does not
exceed .006" (.15 mm).
2. If warpage exceeds .006" (.15 mm), machine cylinder head and/or block gasket surface. Maximum machining allowed is .008" (.20 mm).
If more machining is required, replace block and/or cylinder head.
Installation (1.3L)
1. Place new head gasket properly on block. Carefully place cylinder head in position on block. Install head bolts. Tighten bolts in
sequence and in 2 steps. See Fig. 1
.
2. While tightening rocker arm shaft, slide shaft springs away from retaining bolt to prevent pinching springs. Tighten rocker arm shaft bolts
in sequence and to specification. See Fig. 5
. To complete installation, reverse removal procedure. Tighten all bolts/nuts to
specification. Fill all fluids to proper levels. NOTE:T urbocharger-to-exhaust m anifold m ounting nuts are of special quality. Ensure correct nuts are
used.
NOTE:Ensure one brass washer is positioned on each side of oil line fitting.
NOTE:Feed O2 sensor wire through upper heat shield. Install wire retainer under LH bolt.
NOTE:If turbocharger was replaced: Disconnect ignition coil, crank engine for 20 seconds, connect ignition
coil, start engine and run at idle for 30 seconds and check for leaks.
NOTE:If original tim ing belt is being reused, m ark direction of rotation for installation reference.
Page 4 of 19 MITCHELL 1 ARTICLE - ENGINE OVERHAUL 1991-92 FORD MOTOR CO. ENGINES 1.3L & 1.6L 4-Cylinder
3/10/2009 http://www.eautorepair.net/app/PrintItems.asp?S0=2097152&S1=0&SG=%7B959286D2%2D3A85%2D4BFC%2D9C5C%2D
...

Fig. 1: Installing Cylinder Head Bolts (1.3L)

Courtesy of FORD MOTOR CO.
Removal (1.6L)
1. Release fuel pressure. Drain cooling system. Disconnect negative battery terminal. Remove intake air tube from throttle body.
Disconnect air by-pass hoses. Remove spark plug wires and retainers. Remove intake air tube from air cleaner assembly. Disconnect
coolant hose from thermostat cover. Disconnect vacuum hoses and coolant hoses from throttle body and intake manifold.
2. Disconnect throttle cable and remove retaining brackets and cable. Disconnect fuel lines at fuel filter and pressure regulator. Disconnect
main harness connector. Disconnect O2 sensor connector and remove ground connection retaining screw at bracket. Disconnect
intercooler tubes from turbocharger (if equipped). Remove ground wire and strap retaining bolts at front sides of cylinder head.
3. Remove timing belt covers and timing belt. On turbocharged vehicles, remove exhaust manifold and turbocharger as an assembly. On
non-turbocharged vehicles, disconnect front exhaust pipe from exhaust manifold. Remove intake manifold support upper retaining bolts.
4. Remove cam cover. Remove cylinder head and intake manifold as an assembly. Separate intake manifold from cylinder head (if
required).
Installation (1.6L)
1. Position new (2-piece) exhaust gasket on cylinder head with heavy gasket installed first. Install exhaust manifold to head. Install intake
manifold to head using new gasket. Tighten all manifold nuts to specification. See TORQUE SPECIFICATIONS
table at end of
article.
2. Ensure gasket surfaces of head and block are clean of old gasket and sealant. Place new head gasket on cylinder block. Carefully, place
cylinder head on block. Tighten cylinder head in sequence and in two stages to correct specification. See Fig. 2
.

Fig. 2: Installing Cylinder Head Bolts (1.6L)

Courtesy of FORD MOTOR CO.
3. Install intake manifold support upper retaining bolts and tighten to specification. See TORQUE SPECIFICATIONS
table at end of
NOTE:Ensure coolant passage openings in gasket align with m anifold and cylinder head.
Page 5 of 19 MITCHELL 1 ARTICLE - ENGINE OVERHAUL 1991-92 FORD MOTOR CO. ENGINES 1.3L & 1.6L 4-Cylinder
3/10/2009 http://www.eautorepair.net/app/PrintItems.asp?S0=2097152&S1=0&SG=%7B959286D2%2D3A85%2D4BFC%2D9C5C%2D
...

article. Install timing belt and covers. Install cam cover. On non-turbo engines, connect front exhaust pipe to exhaust manifold. Tighten
nuts to specification.
4. On turbocharged engines, install exhaust manifold and turbocharger assembly. Install ground wire and strap to cylinder head with
retaining bolts. Connect intercooler tubes (if equipped). Connect O2 sensor connector, and install ground wires to bracket on cylinder
head with retaining screw. Connect main engine harness connector. Connect fuel lines to fuel filter and pressure regulator. Install
throttle cable and retaining brackets.
5. Install coolant hoses and vacuum lines to intake manifold and throttle body. Install coolant hose to thermostat cover. Install intake air
tube to air cleaner. Install spark plug wires and retainers. Install intake air tube to throttle body, and connect by-pass hoses. Fill cooling
system. Connect negative battery terminal. Start engine, check for leaks and system operation.
TIMING BELT COVER
Removal & Installation (1.3L)
Remove accessory belts. Remove water pump pulley. Remove crankshaft damper. Remove bolts retaining upper and lower cover halves to
engine front. Remove both covers. To install, reverse removal procedure.
Removal & Installation (1.6L)
Raise vehicle on hoist. Remove RF tire and wheel assembly. Remove RF splash guard. Lower vehicle. Remove spark plugs and set camsh aft
timing to TDC No. 1 cylinder. Remove oil dipstick. Remove water pump pulley. Remove crankshaft pulley, damper and baffle plate. Remove
upper timing belt cover. Remove center and lower timing belt covers. To install, reverse removal procedure.
TIMING BELT
Removal (1.3L)
Remove accessory belts, water pump pulley, crankshaft damper and upper and lower timing belt covers. Mark timing belt direction of rotation
for installation reference. Remove timing belt tensioner pulley bolt. Remove tensioner pulley, spring and spring cover. Remove timing belt.
Installation (1.3L)
1. Ensure timing belt and sprockets are clean and not worn or damaged. Align crankshaft and camshaft timing marks. See Fig. 3 . No. 1
cylinder must be at TDC of compression stroke.
2. Position belt on camshaft sprocket. Install timing belt tensioner spring, spring cover and pulley. Tighten tensioner pulley bolt to
specification. See TORQUE SPECIFICATIONS
table at end of article. To complete installation, reverse removal procedure. Tighten
all bolts and nuts to specification.

Fig. 3: Aligning Camshaft & Crankshaft Timing Marks (1.3L)

Courtesy of FORD MOTOR CO.
Removal (1.6L)
NOTE:Always rotate engine in direction of norm al operation. Rotating crankshaft backwards m ay cause belt to
jump timing.
Page 6 of 19 MITCHELL 1 ARTICLE - ENGINE OVERHAUL 1991-92 FORD MOTOR CO. ENGINES 1.3L & 1.6L 4-Cylinder
3/10/2009 http://www.eautorepair.net/app/PrintItems.asp?S0=2097152&S1=0&SG=%7B959286D2%2D3A85%2D4BFC%2D9C5C%2D
...

Remove timing belt covers, See TIMING BELT COVER procedure to remove timing belt from this engine.
Installation (1.6L)
1. Ensure timing belt and sprockets are clean and not worn or damaged. Ensure timing marks are properly positioned on camshafts and
crankshaft. Intake cam should have letter "I" aligned with arrow on belt cover. Exhaust cam should have letter "E" aligned with arrow on
belt cover. Crankshaft key should align with arrow. See Fig. 4
.
2. Tighten tension pulley with tension spring fully extended. Install timing belt. Keep tension on opposite side of tensioner as tight as
possible. Ensure rotation mark on belt is correct.
3. Turn crankshaft 2 full turns. Check alignment of timing marks. If any mark is not aligned, remove timing belt and reset timing. Lo o se n
tension pulley retaining bolt allowing tension spring to tighten belt. Tighten tension pulley to specification and rotate engine 2 full
turns. Verify timing mark alignment.
4. Measure timing belt tension between camshaft pulleys. Belt deflection should be 0.33-0.45" (8.5-11.5 mm). If incorrect, loosen tension
pulley and repeat procedure. If correct tension cannot be achieved, replace tension spring.
5. Install lower, center and upper timing belt covers, and tighten bolts to specification. See TORQUE SPECIFICATIONS
table at end of
article. Install RH engine mount. Lower engine. Tighten retaining nuts to specification. Install crankshaft pulley, damper and baffle.
Tighten baffle and damper screws and pulley retaining bolts to specification. Install water pump pulley and tighten retaining bolts to
specification.
6. Install alternator and power steering belts. Install oil dipstick. Raise vehicle and install splash guard and RF wheel and tire assembly.
Lower vehicle, install spark plugs and start engine. Inspect for leaks and check operation.

Fig. 4: Aligning Camshaft & Crankshaft Timing Marks (1.6L)

Courtesy of FORD MOTOR CO.
FRONT COVER & OIL SEAL
Removal & Installation
Front cover is the housing for the oil pump. See OIL PUMP under ENGINE OILING.
CAMSHAFT
Removal (1.3L)
Remove cylinder head. Remove rocker arm assemblies if not previously removed. Carefully remove camshaft thrust plate. Remove camsh aft
Page 7 of 19 MITCHELL 1 ARTICLE - ENGINE OVERHAUL 1991-92 FORD MOTOR CO. ENGINES 1.3L & 1.6L 4-Cylinder
3/10/2009 http://www.eautorepair.net/app/PrintItems.asp?S0=2097152&S1=0&SG=%7B959286D2%2D3A85%2D4BFC%2D9C5C%2D
...

Installation
1. Install pressure regulator valve, spring, retainer and new cotter pin. Press a new seal in front cover housing. Install outer and inner gears
in housing. Install pump cover. Coat bolts with Loctite and tighten to specification. See TORQUE SPECIFICATIONS
table at end of
article.
2. Install new gasket and install front cover housing. Install new gasket and install pick-up tube and screen. Tighten all bolts/nuts to
specification. To complete installation, reverse removal procedure.
ENGINE COOLING
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS
1.6L.0012-.0043 (.03-.11)
NOTE:Refer to WAT ER PUMP
under REMOVAL & INSTALLATION in this article.
ApplicationFt. Lbs. (N.m)
"A" Arm Front Bolt72-86 (97-117)
A/C Compressor Bolt29-40 (39-54)
Camshaft Sprocket Bolt36-45 (49-61)
Connecting Rod Nut
Step 111-13 (15-18)
Step 2
1.3L22-25 (30-34)
1.6L35-38 (47-52)
Crankshaft Pulley Bolts9-13 (12-17)
Crankshaft Sprocket Bolt80-87 (108-118)
Crossmember-To-Body Bolt
1.3L47-66 (64-89)
1.6L27-37 (35-50)
Cylinder Head Bolt
Step 135-40 (48-54)
Step 256-60 (76-81)
Exhaust Manifold-To-Cylinder Head
1.3L12-17 (16-23)
1.6L29-42 (39-57)
Exhaust Pipe-To-Manifold29-42 (39-57)
Exhaust Pipe-To-Support Bracket32-45 (43-61)
Flywheel Bolt71-76 (96-103)
Front Cover Housing Bolt (1.3L)14-19 (19-26)
Front Engine Mount Nut32-38 (43-52)
Heater Tube32-45 (43-61)
Intake Manifold-To-Cylinder Head
1.3L14-20 (19-27)
1.6L47-66 (64-89)
Main Bearing Cap Bolts40-44 (54-59)
O2 Sensor27-33 (37-45)
Oil Pump Cover Bolt (1.6L)14-18 (19-25)
P/S Pump Bracket (Nut & Bolt)35-49 (47-66)
P/S Adjusting Nut27-38 (37-52)
P/S Pivot Bolt23-34 (31-46)
Pulse Air Tube Nut23-34 (31-46)
Rear Engine Mount Nut
1.3L21-34 (28-46)
1.6L47-66 (64-89)
Rocker Arm Shaft Bolts16-21 (22-28)
Side Engine Mount Nuts
1.3L29-40 (39-54)
1.6L
RH49-67 (67-91)
LH33-48 (45-65)
Spark Plug11-17 (15-23)
Thermostat Housing Bolt14-22 (19-30)
Timing Belt Tensioner Adjusting Bolt14-19 (19-26)
Turbo Oil Supply Tube
Engine Block Side12-18 (16-24)
Banjo Side(1) 106-159 (12-18)
Turbo-To-Manifold29-42 (39-57)
Water Outlet Bolt14-22 (19-30)
Water Pump Pulley Bolts (1.3L)36-45 (49-61)
Page 15 of 19 MITCHELL 1 ARTICLE - ENGINE OVERHAUL 1991-92 FORD MOTOR CO. ENGINES 1.3L & 1.6L 4-Cylinder
3/10/2009 http://www.eautorepair.net/app/PrintItems.asp?S0=2097152&S1=0&SG=%7B959286D2%2D3A85%2D4BFC%2D9C5C%2D
...

Back To Article
C - SPECIFICATIONS
1991 ENGINE PERFORMANCE Ford/Mercury - Service & Adjustm ent Specifications
INTRODUCTION
Use this article to quickly find specifications related to servicing and on-vehicle adjustments. This is a quick-reference article to use when you
are familiar with an adjustment procedure and only need a specification.
CAPACITIES
BATTERY SPECIFICATIONS
FLUID CAPACITIES
FLUID CAPACITIES
QUICK-SERVICE
SERVICE INTERVALS & SPECIFICATIONS
REPLACEMENT INTERVALS
BELT ADJUSTMENTS
(1)
BELT ADJUSTMENTS
(1)
MECHANICAL CHECKS
ENGINE COMPRESSION
Check engine compression at specified cranking speed with engine at normal operating temperature, all spark plugs removed and throttle wide
open.
COMPRESSION SPECIFICATIONS
ApplicationAmp Hr. Rating
1.3L & 1.6L50
ApplicationQts. (L)
Crankcase (Includes Filter)3.6 (3.4)
Cooling System (Includes Heater)5.3 (5.0)
Manual Transaxle (Mercon)2.6 (2.5)
Automatic Transaxle (Mercon)6.0 (5.7)
ApplicationQts. (L)
Crankcase (Includes Filter)
Non-Turbo3.5 (3.3)
Turbo3.7 (3.5)
Cooling System (Includes Heater)
Non-Turbo5.3 (5.0)
Turbo6.3 (6.0)
Manual Transaxle (Mercon)3.4 (3.2)
Automatic Transaxle (Mercon)6.0 (5.7)
ComponentInterval (Miles)
Air Filter30,000
Camsh aft Timin g Bel t60,000
Coolant30,000
Oil & Filter3000
Spark Plugs30,000
ApplicationNew BeltUsed Belt
A/C Belt110-125 (50-57)92-110 (42-50)
Alternator Belt110-132 (50-60)95-110 (43-50)
(1)Tension in Lbs. (Kg) Using Strand Tension Gauge
ApplicationNew BeltUsed Belt
A/C Belt110-132 (50-60)110-132 (50-60)
Alternator Belt110-132 (50-60)110-132 (50-60)
(1)Tension in Lbs. (Kg) Using Strand Tension Gauge.
ApplicationSpecification
Compression Ratio
1.3L9.7:1
1.6L(1)
Compression Pressure(2)
Page 1 of 3 MITCHELL 1 ARTICLE - C - SPECIFICATIONS 1991 ENGINE PERFORMANCE Ford/Mercury - Service & Adjustment Spe
...
3/10/2009 http://www.eautorepair.net/app/PrintItems.asp?S0=2097152&S1=0&SG=%7B7DD6473C%2DB5BB%2D4F20%2D9D70%2D
...

VALVE CLEARANCE
IGNITION SYSTEM
IGNITION COIL
IGNITION COIL RESISTANCE
CRANKSHAFT POSITION SENSOR
CRANKSHAFT POSITION SENSOR RESISTANCE
HIGH TENSION WIRE RESISTANCE
HIGH TENSION WIRE RESISTANCE
SPARK PLUGS
SPARK PLUG TYPE
SPARK PLUG SPECIFICATIONS
FIRING ORDER & TIMING MARKS

Fig. 1: Firing Order & Distributor Rotation

IGNITION TIMING
(1)Information is not available.
(2)Lowest cylinder compression reading should not be less than 75 percent of highest cylinder compression reading.
NOTE:All m odels are equipped with hydraulic lash adjusters. No adjustm ents are required.
ApplicationPrimary (Ohms)Secondary (Ohms)
1.3L & 1.6L0.8-1.66000-30,000
ApplicationOhms
1.3L(1) 210-250
1.6L(2)
(1)Measured between CPS (Yellow/Blue) and GND terminal.
(2)Capri is equipped with Cylinder Identification (CID) sensor. Resistance is not specified.
ApplicationOhms
Coil Wire & Spark Plug Wires4000-6000 per foot
ApplicationMotorcraft
1.3LAGS32C
1.6L
Non-TurboAGSP32C
TurboAGS32C
ApplicationGap: In.- (mm)Torque: Ft.-Lbs./(N.m)
1.3L & 1.6L.039-.043 (1.0-1.1)10-17 (14-23)
ApplicationAuto. Trans.Man. Trans.
1.3L9-11 @ 8509-11 @ 700
1.6L Non-Turbo1-3 @ 8500-4 @ 850
1.6L Turbo10-14 @ 8500-4 @ 850
Page 2 of 3 MITCHELL 1 ARTICLE - C - SPECIFICATIONS 1991 ENGINE PERFORMANCE Ford/Mercury - Service & Adjustment Spe
...
3/10/2009 http://www.eautorepair.net/app/PrintItems.asp?S0=2097152&S1=0&SG=%7B7DD6473C%2DB5BB%2D4F20%2D9D70%2D
...

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 st il l n o
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
OpenOpenLess than one
GroundedOpenLess than 10
OpenGroundedGreater than 10
GroundedGroundedGreater than 10
ApplicationPrimary (Ohms)Secondary (Ohms)
1.3L & 1.6L0.8-1.66000-30,000
Copyr ight 2009 Mitchell Repair Information Company, LLC. All Rights Reserved.
Page 3 of 4 MITCHELL 1 ARTICLE - F - BASIC TESTING 1991-92 ENGINE PERFORMANCE Ford Motor Co. Basic Diagnostic Proced
...
3/10/2009 http://www.eautorepair.net/app/PrintItems.asp?S0=2097152&S1=0&SG=%7B959286D2%2D3A85%2D4BFC%2D9C5C%2D
...

1.3L
1. Connect spark tester between coil secondary wire and ground. Crank engine several times, leaving ignition on between cranking periods.
If continuous sparks jump tester gap, go to next step. If continuous sparks do not jump tester gap, go to step 3).
2. With ignition off, connect BOB, leaving ECA disconnected. Connect test light between test pins IDM and VPWR. Crank engine several
times. If test light flashes each time engine cranks, IDM circuit is okay. Return to QUICK TESTS if directed here from there. If test light
does not flash, repair IDM wire between ECA and coil.
3. Unplug connector from ignition coil. Connect test light between coil IDM wire and PWR wire. Crank engine several times, leaving
ignition on between cranking periods. If test light flashes continuously, go to next step. If test light does not flash continuously, go to
step 6).
4. Turn ignition on. Measure voltage between coil harness PWR wire and ground. If voltage is greater than 10 volts, replace coil. If voltage
is less than 10 volts, repair wire between ignition switch and coil.
5. Connect test light between PWR and ground terminals at coil harness connector. Turn ignition on. If test light glows, replace coil. If test
light does not glow, repair ground wire to coil.
6. Unplug connector from ignition module. Connect jumper wire between SPOUT wire on ignition module harness connector and mating
terminal on ignition module. Connect another jumper wire between ignition module GND wire and mating connector. Leave IDM wire
disconnected. Connect test light between IDM terminal on ignition module and PWR wire. Crank engine several times, leaving ignition
on between cranking periods. If test light flashes each time engine cranks, repair wire between ignition module IDM wire and coil . If t est
light does not flash, go to next step.
7. Turn ignition off. Unplug ignition module connector. Turn ignition on. Measure voltage between ignition module PWR wire and ground.
Turn ignition on. If voltage is not more than 10 volts, repair PWR wire from ignition switch. If voltage is more than 10 volts, go t o n e xt
step.
8. Turn ignition off. Unplug ignition module connector. Turn ignition on. Connect test light between ignition coil PWR wire and ignition
module GND wire. Turn ignition on. If test light glows, go to step 10). If test light does not glow, go to next step.
9. Turn ignition off. Unplug ignition module connector. Connect test light between ignition coil PWR wire and ignition module SPOUT
wire. Crank engine. If test light flashes, check ignition module SPOUT wire for short to ground; if no short exists, replace ignition
module. If test light does not flash, go to next step.
10. Turn ignition off. Unplug ignition module connector. Install BOB, leaving ECA disconnected. Check SPOUT wire for continuity
between BOB test pin and ignition module. If continuity exists, check SPOUT wire for shorts to any other wire. If no short exists,
replace ECA. If continuity does not exist, repair SPOUT wire to ECA.
1.6L
1. Connect spark tester between coil secondary wire and ground. Crank engine several times, leaving ignition on between cranking periods.
If continuous sparks do not jump tester gap, go to step 3). If continuous sparks jump tester gap, go to next step.
2. Turn ignition off. Connect BOB. Leave ECA disconnected. Connect test light between test BOB pins IDM and VPWR. Crank engine
several times. If test light flashes each time engine cranks, IDM circuit is okay. Return to QUICK TESTS if directed here from there. If
test light does not flash, repair IDM wire between ECA and coil.
3. Unplug connector from ignition coil. Connect test light between coil IDM wire and PWR wire. Crank engine several times, leaving
ignition on between cranking periods. If test light does not flash continuously, go to step 6). If test light flashes continuously, go to next
step.
4. Turn ignition on. Measure voltage between coil harness PWR wire and ground. If voltage is greater than 10 volts, replace coil. If voltage
is less than 10 volts, repair wire between ignition switch and coil.
5. Connect test light between PWR and ground terminals at coil harness connector. Turn ignition on. If test light glows, replace coil. If test
light does not glow, repair ground wire to coil.
6. Unplug connector from ignition module. Connect a jumper wire between PWR wire on ignition module harness connector and mating
terminal on ignition module. Leave IDM wire disconnected. Connect test light between IDM terminal on ignition module and PWR
wire. Crank engine several times, leaving ignition on between cranking periods. If test light flashes each time engine cranks, repair wire
between ignition module IDM wire and coil. If test light does not flash. go to next step.
7. Unplug connector from ignition module. Measure voltage between ignition module PWR wire and ground. If voltage is not higher than
10 volts, repair PWR wire from ignition switch. If voltage is higher than 10 volts, go to next step.
8. Turn ignition off. Unplug ignition module connector. Turn ignition on. Connect test light between ignition module PWR wire and
ignition module GND wire. Turn ignition on. If test light glows, replace ignition module. If test light does not glow, repair ignition
module ground wire.
PINPOINT TEST CPS - CRANKSHAFT POSITION SENSOR
1.3L
GND2A39, 40, 44, 60BLK
IDM(1) (1) YEL/GRN
PWR(1) (1) BLK/WHT
SPOUT1G36BLU/ORG
1.6L
IDM1M6YEL/BLU
PWR**********BLK/WHT
(1)ECA and BOB pins not specified.
NOTE:Enter this test only when Code 02 is displayed during QUICK T EST S procedure or when directed here
from another PINPOINT TEST.
Page 6 of 20 MITCHELL 1 ARTICLE - G - TESTS W/CODES 1991-92 ENGINE PERFORMANCE Ford Motor Co. Self-Diagnostics
3/10/2009 http://www.eautorepair.net/app/PrintItems.asp?S0=2097152&S1=0&SG=%7B7DD6473C%2DB5BB%2D4F20%2D9D70%2D
...

IDLE SPEED
While the engine is cold, the Idle Speed Control By-Pass Air (ISC-BPA) Valve increases idle speed to warm the engine quickly. At engine
temperatures less than 140°F (60°C), the valve is open. As the engine warms, the valve begins to close. The valve is fully closed at engine
temperatures higher than 140°F (60°C). Idle speed is also affected by various switches, sensors and load on the engine.
ELECTRONIC IGNITION SYSTEM
CAPRI
A pick-up coil within the distributor sends a signal to a Distributor-Mounted Ignition Module With Vacuum Advance (DMIVA) within the
distributor. The DMIVA then sends a signal which fires the coil. When the coil fires, the distributor directs high voltage current to the spark
plugs. The DMIVA system operates independently of the ECA.
FESTIVA
A pick-up coil within the distributor sends a signal to a transistorized ignition module on the coil bracket. A timing signal also goes from the
ECA to the ignition module. The ignition module then sends a signal which fires the coil. When the coil fires, the distributor directs high
voltage current to the spark plugs.
IGNITION TIMING CONTROL SYSTEM
CAPRI
Spark timing is controlled by vacuum and centrifugal advance mechanisms and by a signal from the ECA. The ECA does not affect ignition
timing on turbo models. On turbo models, a knock sensor and control unit retard ignition timing when knock occurs.
FESTIVA
The ECA generates a spark timing signal from data received from the BP, CPS and VAF. This signal goes to the ignition module. The ignition
module then sends a signal to fire the coil.
HIGH ALTITUDE SPARK ADVANCE CORRECTION
A barometric pressure sensor is incorporated into the ECA on Festiva and is a separate component on Capri. At high altitudes, the ECA sends
a signal to the ignition module to advance ignition timing. This feature is not used on turbo models.
KNOCK SENSOR (CAPRI)
A Knock Sensor (KS) generates a signal when knock occurs. A control unit processes this signal and then sends it to the ignition module to
retard spark timing. The KS is located in the engine block, near the oil pressure switch. This device is only used on 1.6L turbo engines.
KNOCK CONTROL UNIT (CAPRI)
The Knock Control Unit filters normal engine vibration signals from the KS, then sends a signal to the ignition module to retard spark timing.
This unit, used only on 1.6L turbo engines, is located on right side of engine compartment.
EMISSION SYSTEMS
DECELERATION SYSTEM (DASHPOT)
The deceleration control system closes the throttle plate gradually during deceleration. The dashpot prevents engine stalling on deceleration
and provides a smooth transition from deceleration to sudden acceleration.
EVAPORATIVE SYSTEM
CARBON CANISTER
The carbon canister stores vapors from the fuel tank until they are purged and burned in the engine. On Festiva, carbon canister is
located under the brake booster. On Capri, carbon canister is located on the right side of the engine compartment near the cowl panel.
CANISTER PURGE SOLENOID
This component is connected between the carbon canister and intake manifold. When the ECA sends a signal to the solenoid to open,
fuel vapors in the carbon canister are drawn into the engine.
CANISTER PURGE VALVE
This valve opens to purge vapors from the carbon canister into the engine intake system. The valve is part of the canister purge solenoid.
ROLLOVER VENT VALVE
This valve, located in front of the fuel tank, blocks the vapor line in case of vehicle rollover.
This valve, located in front of the fuel tank, blocks the vapor line in case of vehicle rollover.
CATALYTIC CONVERTER
The catalytic converter is in the exhaust system, between the exhaust manifold and the muffler. It converts certain pollutants in the exhaust
Page 5 of 6 MITCHELL 1 ARTICLE - E - THEORY/OPERATION 1991 ENGINE PERFORMANCE Ford/Mercury Theory & Operation
3/10/2009 http://www.eautorepair.net/app/PrintItems.asp?S0=2097152&S1=0&SG=%7B7DD6473C%2DB5BB%2D4F20%2D9D70%2D
...