Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1991CLUB WAGON E350, 7.3 MREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGDISTRIBUTORLESS IGNITION SYSTEM (DIS) 2.3LTEST 5, DETERMINE MISSING SPARK COMBINATION
1991 Ford Club Wagon E350, 7.3 M
Test 5, Determine Missing Spark Combination
1991 Ford Club Wagon E350, 7.3 MSECTION Test 5, Determine Missing Spark Combination
If during cranking spark is missing from both cylinders No. 1 and 4 plug wires or both cylinders No. 2 and 3 plug wires, go to next test. If spark is present, go to TEST 7.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.