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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 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. 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. |