1991 FORD FESTIVA Fuel system

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A - ENGINE/VIN ID
1991 ENGINE PERFORMANCE Ford/Mercury - Introduction
APPLICATION
MODEL COVERAGE
VIN DEFINITION
Numbers preceding the explanations in the legend below refer to the sequence of characters as listed on VIN identification label.
SAMPLE VIN
Digit #: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17.
(VIN) K N J P T O 6 H 9 L 6 1 0 0 0 0 0.
VIN Definition
1-3 - Indicates Nation of Origin.
4 - Indicates Restraint System.
5 - Indicates Carline Code.
6-7 - Indicates Body Type.
8 - Indicates Engine Type.
9 - Indicates Check Digit.
10 - Indicates Model Year.
11 - Indicates Assembly Plant.
12-17 - Vehicle Serial Number.
ENGINE CODE LOCATION

Fig. 1: Engine Code Location

Courtesy of FORD MOTOR CO.
MODEL YEAR VIN CODE APPLICATION
ModelBody CodeEng. Type (1) Eng. IDFuel Sys.Ign. Sys.
Capri011.6LZPFIMagnetic
Capri011.6L Turbo6 (2) PFIMagnetic
Festiva05, 06, 071.3LHPFIMagnetic
(1)See vehicle engine code label affixed to timing belt cover, See Fig. 1 .
(2)XR2 model W/intercooled turbo.
VIN CodeModel Year
L1990
M1991
Copyr ight 2009 Mit chell Repair Information Company, LLC. All Rights Reserved.
Article GUID: A00022694
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EMISSION CONT ROL APPLICAT IONS
Em ission Applications - Ford Motor Co. - Im ports (1968-97)
EMISSION APPLICATIONS
1968-97 FORD MOTOR CO. - IMPORTS
Year, Model, Engine & Fuel System(1) Emission Control Systems & Devices
1968-69
Cortina 1.6L Carb.PCV, AIS
1970
Capri & Cortina (Except GT) 1.6L Carb.PCV, ACL, (2) EVAP, SPK,
EVAP-VC, SPK-DDD, DCLV
Cortina GT 1.6L Carb.PCV, (2)EVAP, AIS,
EVAP-VC
1971
Capri 1.6L Carb.PCV, ACL, EVAP, SPK,
EVAP-VC, SPK-DDD, DCLV
Pantera 5.8L V8 Carb.PCV, EVAP, SPK,
EVAP-VC, SPK-DDD
1972
Capri 1.6L Calif. Carb.PCV, ACL, EVAP, SPK,
EVAP-VC, SPK-DDD, SPK-TCS, DCLV
1.6L Fed. Carb.PCV, ACL, EVAP, SPK,
EVAP-VC, SPK-DDD, DCLV
2.0L Calif. Carb.PCV, ACL, EVAP, SPK,
EVAP-VC, SPK-DDD, DCLV
2.0L Fed. Carb.PCV, ACL, EVAP, SPK,
EVAP-VC, SPK-DDD, DCLV
2.6L Carb.PCV, ACL, EVAP, SPK,
EVAP-VC, SPK-DDD, DCLV
Courier 1.8L Calif. Carb.PCV, EVAP, AIS,
EVAP-VC, CRV
Fed. Carb.PCV, EVAP, SPK,
EVAP-VC, SPK-DPD
Pantera 5.8L V8 Carb.PCV, EVAP, SPK,
EVAP-VC, SPK-DDD
1973
Capri 2.0L Calif. Carb.PCV, ACL, EVAP, SPK,
EVAP-VC, SPK-DDD, DCLV
2.0L Fed. Carb.PCV, ACL, EVAP, SPK,
EVAP-VC, SPK-DDD, SPK-TCS, DCLV
2.6L A/T Carb.PCV, ACL, EVAP, SPK,
EVAP-VC, SPK-DDD
2.6L M/T Carb.PCV, ACL, EVAP, SPK,
EVAP-VC, SPK-DDD, SPK-TCS, DCLV
Courier 1.8L Calif. Carb.PCV, EVAP, AIS,
EVAP-VC, CRV
Fed. Carb.PCV, EVAP, SPK,
EVAP-VC, SPK-DPD, CRV
Pantera 5.8L V8 Carb.PCV, EVAP, SPK,
EVAP-VC, SPK-DDD
1974
Capri 2.0L Carb.PCV, ACL, EVAP, EGR, AIS,
EVAP-VC, DCLV
2.8L Carb.PCV, ACL, EVAP, (3) EGR, (2) AIS,
EVAP-VC, DCLV
Courier 1.8L Carb.PCV, EVAP, AIS,
EVAP-VC, CRV
Pantera 5.8L V8 Carb.PCV, ACL, EVAP, SPK,
EVAP-VC, SPK-DDD
1975
Capri II 2.3L Carb.PCV, ACL, EVAP, (2) OC, (2) FR, EGR, (3)SPK,
AIS,
EVAP-VC, SPK-DV, DCLV
2.8L Carb.PCV, ACL, EVAP, OC, FR, EGR, (2)SPK, AIS,
EFE,
EVAP-VC,
(4) SPK-CSSA, SPK-DDD, EFE-HCV, (5)
DCLV
Courier 1.8L Carb.PCV, EVAP, AP,
EVAP-VC, CRV
1976
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CEC
Computerized Engine Controls
DOHC
Dual Overhead Cam
DPFE
Differential Pressure Feedback EGR Valve
EAIR
Electric Air Injection System
EAIR DV
Electric Air Injection System Diverter Valve
ECM
Electronic Control Module
ECU
Electronic Control Unit
EGR
Exhaust Gas Recirculation
EVRS
EGR Vacuum Regulator Solenoid
EVAP
Fuel Evaporative System
EVAP-AAC
EVAP Auxiliary Air Control
EVAP-BPSV
EVAP By-Pass Solenoid Valve
EVAP-BVSV
EVAP Bimetallic Vacuum Switching Valve
EVAP-CAV
EVAP Canister Air Valve
EVAP-CCV
EVAP Control Canister Close Valve
EVAP-CCVSV
EVAP Control Canister Vent Shut Valve
EVAP-CCVVSV
EVAP Closed Canister Valve Vacuum Switching Valve
EVAP-CDCV
EVAP Canister Drain Cut Valve
EVAP-CKV
EVAP Check Valve
EVAP-CPCS
EVAP Canister Purge Control Solenoid
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EVAP-CPCV
EVAP Canister Purge Control Valve
EVAP-CPRV
EVAP Canister Purge Regulator Valve
EVAP-CPSV
EVAP Canister Vent Shut Valve
EVAP-CPT
EVAP Canister Purge Timer
EVAP-CPTVS
EVAP Canister Purge Thermal Vacuum Switch
EVAP-CPV
EVAP Canister Vent Valve
EVAP-CPVCSV
EVAP Canister Purge Volume Control
EVAP-CPVDV
EVAP Canister Purge Vacuum Delay Valve
EVAP-CS
EVAP Control Solenoid
EVAP-CSPS
EVAP Control System Pressure Sensor
EVAP-ORVR
Evaporative On-Board Refueling Vapor Recovery System
EVAP-ORVRFTVRV
EVAP-ORVR Fuel Tank Vapor Recirculation
EVAP-OVCV
EVAP Outer Vent Control Valve
EVAP-OW V
EVAP One-Way Valve
EVAP-PCSV
EVAP Purge Cut-Off Solenoid Valve
EVAP-PFS
EVAP Purge Flow Sensor
EVAP-PFSVVSV
EVAP Purge Flow Switching Valve Vacuum Switching Valve
EVAP-PRRV
EVAP Pressure Relief Rollover Valve
EVAP-VC
EVAP Vapor Canister
FF
Flexible Fuel
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ELECTRONIC CONTROL ASSEMBLY (ECA)
REMOVAL & INSTALLATION
Disconnect negative battery cable. On Festiva, from under instrument panel, remove heater duct. On Capri, disengage push-pin retainers by
pulling back on front edges of both center carpet panels. Remove carpet panel retaining screws and panels. Disconnect ECA wire harness
connector. Remove ECA bolts and ECA. To install, reverse removal procedure. On Festiva, ensure mounting clip is inserted into bulkhead
recess.
FUEL SYSTEM
FUEL SYSTEM PRESSURE RELEASE
Remove rear seat assembly. With engine running, disconnect fuel pump connector. Run engine until it stalls to relieve fuel line pressure.
FUEL INJECTORS
Removal
Relieve fuel system pressure. On Capri, remove throttle body. On Festiva, remove intake plenum. See INTAKE PLENUM. Remove fuel inlet
and fuel return line from fuel rail. Remove electrical connectors from injectors. Remove pressure regulator. See Fig. 4
. Remove fuel rail
attaching bolts and fuel rail. Remove fuel injectors.
Installation
Install NEW "O" rings on fuel injectors and lubricate with gasoline. Install fuel injectors into cylinder head. Install fuel rail onto fuel injectors.
Install fuel rail attaching bolts. To complete installation, reverse removal procedure. Check system for leaks.

Fig. 4: Exploded View of Fuel Control System

Courtesy of FORD MOTOR CO.
FUEL PUMP
Removal
Remove fuel tank sending unit. Remove fuel filter from pump. Remove fuel pump wires from sending unit. Remove retaining clamp screw and
clamp. Remove rubber retaining band (if equipped). Remove fuel pump from sending unit.
Installation
To install, reverse removal procedure. Check system for leaks.
INTAKE PLENUM WARNING:ALWAYS relieve fuel pressure before disconnecting any fuel injection-related com ponent. DO NOT
allow fuel to contact engine or electrical com ponents.
WARNING:ALWAYS relieve fuel pressure before disconnecting any fuel-related com ponent. DO NOT allow fuel to
contact engine or electrical com ponents.
Page 3 of 5 MITCHELL 1 ARTICLE - N - REMOVE/INSTALL/OVERHAUL 1991 ENGINE PERFORMANCE Ford/Mercury Removal, O
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1991 ENGINE PERFORMANCE
Fuel Pressure Specifications
FUEL SYSTEMS
FUEL PRESSURE
1991 FUEL PRESSURE SPECIFICATIONS (EEC-IV - CARS)
1991 FUEL PRESSURE SPECIFICATIONS (EEC-IV - TRUCKS)
1991 FUEL PRESSURE SPECIFICATIONS (EEC - CARS)
EngineKOER psi (kg/cm2 )KOEO psi (kg/cm2 )
2.3L HSC EFI SEFI45-60 (3.2-4.2)50-60 (3.5-4.2)
3.0L SHO SEFI28-33 (2.0-2.3)30-45 (2.1-3.2)
3.8L SC SEFI30-40 (2.1-2.8)35-40 (2.5-2.8)
All Others30-45 (2.1-3.2)35-40 (2.5-2.8)
EngineKOER psi (kg/cm2 )KOEO psi (kg/cm2 )
4.9L EFI45-60 (3.2-4.2)50-60 (3.5-4.2)
All Others30-45 (2.1-3.2)35-45 (2.5-3.2)
EngineKOER psi (kg/cm2 )KOEO psi (kg/cm2 )
1.3L25-31 (1.8-2.2)64-85 (4.5-6.0)
1.6L28-31 (2.0-2.2)64-85 (4.5-6.0)
1.8L(1) 64-85 (4.5-6.0)
2.2L27-33 (1.9-2.3)64-85 (4.5-6.0)
2.2L Turbo27-33 (1.9-2.3)64-85 (4.5-6.0)
(1)Fuel pressure should be 30-37 psi (2.1-2.6 kg/cm2 ) with engine running and vacuum hose connected to fuel pressure regulator.
Fuel pressure should be 38-45 psi (2.7-3.2 kg/cm
2 ) with engine running and vacuum hose disconnected to fuel pressure regulator.
Copyr ight 2009 Mitchell Repair Information Company, LLC. All Rights Reserved.
Article GUID: A00123317
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FUEL SYSTEM
FUEL PUMP
FUEL PUMP PERFORMANCE
INJECTOR RESISTANCE
FUEL INJECTOR RESISTANCE
IDLE SPEED
IDLE SPEED
(1)
THROTTLE POSITION SWITCH (TPS)
TPS ADJUSTMENT NOTE:For fuel pressure specifications, see FUEL PRESSURE SPECIFICAT IONS
article.
NOTE:Fuel pum p perform ance is a m easurem ent of fuel pressure and volum e availability, not regulated fuel
pressure.
ApplicationPressure -psi kg/cm2 )Min. Vol. in 10 sec. oz. (CC)
1.3L(1) 7.4 (220)
1.6L(1) 5.5 (167)
(1)For fuel pressure specifications, see FUEL PRESSURE SPECIFICATIONS article.
ApplicationOhms
1.3L & 1.6L12-16
ApplicationAuto. Trans.Man. Trans.
1.3L830-870680-720
1.6L800-900800-900
(1)With jumper wire connected between single-wire STI terminal and ground.
NOTE:Capri is equipped with throttle position sensor. No adjustm ent is required.
Test Condition (1) Cont. Between IDL-TLCont. Between PSW-TL
.02" (.5 mm)YesNo
.03" (.7 mm)NoNo
Wide Open ThrottleNoYes
(1)Insert specified feeler gauge between throttle adjustment screw and stop lever.
Copyr ight 2009 Mitchell Repair Information Company, LLC. All Rights Reserved.
Article GUID: A00022695
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F - BASIC TESTING
1991-92 ENGINE PERFORMANCE Ford Motor Co. Basic Diagnostic Procedures
INTRODUCTION
The following diagnostic steps help prevent overlooking simple problems and begin diagnosis for a no-start condition.
The first step in diagnosing any driveability problem is to verify the complaint. Test drive the vehicle under the conditions in which the
problem reportedly occurred.
Before entering self-diagnostics, perform a careful and complete visual inspection. Most engine control problems result from mechanical
breakdowns, poor electrical connections or damaged/misrouted vacuum hoses. Before condemning the computerized system, perform each test
listed in this article.
PRELIMINARY INSPECTION & ADJUSTMENTS
VISUAL INSPECTION
Perform a visual inspection of all electrical wiring. Look for chafed, stretched, cut or pinched wiring. Ensure electrical connections fit tightly
and are not corroded. Ensure vacuum hoses are properly routed and are not cut or pinched. If necessary, see VACUUM DIAGRAMS article in
the ENGINE PERFORMANCE Section to verify routing and connections. Inspect air induction system for possible vacuum leaks.
MECHANICAL INSPECTION
Compression
Engine mechanical condition can be checked using a compression gauge, vacuum gauge or engine analyzer. See engine analyzer instruction
manual for specific instructions. Lowest compression reading must be not less than 75 percent of highest reading.
Exhaust System Backpressure
Exhaust system can be checked with a vacuum gauge or a 0-5 psi pressure gauge. If a pressure gauge is used, remove O2 sensor. Connect gauge
to O2 sensor port. Start engine, and run at 2500 RPM. If exhaust system backpressure is more than 2 psi, exhaust system or catalytic converter
is plugged.
If a vacuum gauge is used, connect it to intake manifold vacuum. Start engine. Observe vacuum gauge. Open throttle part way and hold steady.
If vacuum gauge drops slowly after stabilizing, check exhaust system for a restriction.
FUEL PRESSURE
Fuel Pressure Release
Start engine (if possible), and unplug VAF meter connector. When engine stalls, turn ignition off and reconnect VAF meter wiring. Usin g sh o p
towel, cover fitting to absorb leakage when opening fuel system.
Fuel Pressure Check
1. Connect fuel pressure gauge between fuel filter and fuel rail. Open main valve, and close drain valve. Locate fuel pump check connector
in engine compartment, near left strut. Connect jumper wire between fuel pump test terminals (Black and Green/White wires on Capri
or Black and Green/Red wires on Festiva).
2. Turn ignition on to activate fuel pump. If pump does not run, check fuel pump circuit. If possible, start engine. Measure and record fuel
pressure. For fuel pressure specifications, see FUEL PRESSURE SPECIFICATIONS
article. Disconnect vacuum from pressure
regulator. Turn engine off. Wait 5 minutes and ensure residual pressure is at least 21 psi (1.5 kg/cm
2 ).
3. Operate fuel pump by reconnecting jumper wire at fuel pump check connector. Check fuel pump performance. Pinch hose between
pressure gauge and fuel filter. Do not hold longer than necessary to check pressure.For fuel pressure specifications, see FUEL
PRESSURE SPECIFICATIONS article. If pump does not meet specifications, check fuel pump circuit, fuel pump, fuel tank and fuel
filter or replace fuel pump.
FUEL PUMP PERFORMANCE NOTE:Unless stated otherwise in test procedure, perform all voltage tests with a Digital Volt-Ohm m eter
(DVOM) with a m inim um 10-m egohm input im pedance.
CAUT ION: DO NOT use ignition switch during com pression tests on fuel injected vehicles. Fuel injectors are
triggered by ignition switch during cranking m ode. Use a rem ote starter to crank engine to prevent fire
hazard and catalytic converter and engine oiling system contam ination.
WARNING:ALWAYS relieve fuel pressure before disconnecting any fuel injection system com ponent. DO NOT
allow fuel to contact engine or electrical com ponents.
NOTE:For 1991 fuel pressure specifications, see FUEL PRESSURE SPECIFICAT IONS
article. For 1992 fuel
pressure specifications, see FUEL PRESSURE SPECIFICAT IONS
article.
ApplicationPressure psi (kg/cm2 )Min. Vol. in 10 sec. Ozs. (cc)
Capri(1) 5.5 (167)
Festiva(1) 7.4 (220)
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