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.
1996 Ford RV Cutaway 5.8 HFACTORY OEM SERVICE PROCEDURE
Spark Output Check
- Check for trouble codes stored in PCM and repair if necessary. See QUICK TEST in the TESTS W/CODES - 5.8L EEC-IV article. If no trouble codes are retrieved, check ignition system wiring harness connectors for damage, corrosion and tight fit.
- If no fault codes are retrieved and vehicle will start, go to the TESTS W/O CODES - 5.8L EEC-IV article. If no fault codes are retrieved and vehicle is a no-start, connect a high-output spark tester between ignition coil wire and engine ground. Check for spark at coil wire while cranking engine. A consistent Blue spark should be present.
- If spark is present, go to step 4). If no spark is present, remove distributor cap and crank engine to ensure distributor rotor rotates. If okay, check resistance of coil secondary wire. Resistance should be less than 7000 ohms per foot. Service coil wire as necessary and retest. If spark is not present, go to IGNITION SYSTEMS in SYSTEM/COMPONENT TESTS - 5.8L EEC-IV article.
- If a consistent Blue spark is present at coil wire during cranking, inspect distributor cap and rotor for cracks or carbon tracking. Service as necessary and test spark output at spark plugs. If spark is present at spark plugs and engine will not start, go to the TESTS W/O CODES - 5.8L EEC-IV article.
Factory Service Tools
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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.
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