1991 FORD FESTIVA ignition

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FORD FESTIVA 1991  Service Manual VANE AIR TEMPERATURE RESISTANCE (1) 
WIDE OPEN THROTTLE SWITCH (1.3L) 
This switch is part of the throttle position switch. See THROTTLE POSITION SWITCH (1.3L). 
MODULES, RELAYS & SOLENOIDS 
MODULES

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FORD FESTIVA 1991  Service Manual resistance is not within specifications. If injector resistance is okay, check for 12 volts at each injector connector. Repair or replace 
connector as necessary.  
FUEL INJECTOR RESISTANCE 
IDLE CONT

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FORD FESTIVA 1991  Service Manual Back To Article 
G - T EST S W/CODES
1991-92 ENGINE PERFORMANCE Ford Motor Co. Self-Diagnostics 
INTRODUCTION 
If no faults were found while performing BASIC TESTING , proceed with self-diagnostics. I

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FORD FESTIVA 1991  Service Manual memory. Intermittent failures may be caused by a sensor, connector, or wiring. See INTERMITTENTS in TESTS W/O CODES article in the 
ENGINE PERFORMANCE Section. 
VISUAL CHECK & VEHICLE PREPARATION 
Bef

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FORD FESTIVA 1991  Service Manual Engine control system communicates malfunctions to technician through service codes. These service codes are 2-digit numbers representing a 
particular defect. Service codes are transmitted through ST

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FORD FESTIVA 1991  Service Manual CLEARING CODES 
Clearing Codes Procedure 
Disconnect negative battery cable. Press brake pedal for 5-10 seconds. Turn off VOM or Super Star II tester. Reconnect battery. 
ECA LOCATION 
ECA is located

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FORD FESTIVA 1991  Service Manual WIGGLE TEST 
Checking Circuitry 
1. Visually inspect suspected sensor, switch, or solenoid. Enter WIGGLE TEST if using Super Star II tester. If using VOM, connect it to 
STO terminal on self-test conn

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FORD FESTIVA 1991  Service Manual 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.