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.
1985 Chevrolet Step Van P30, 7.4 W, StandardFACTORY OEM SERVICE PROCEDURE
Primary Resistance
- Remove coil connector. Using the low scale, connect ohmmeter leads to coil's battery and "TACH" terminals. See Fig 1. Resistance should be zero or nearly zero. If not, replace ignition coil.
- Set ohmmeter on high scale, and connect leads to battery terminal and a good ground on coil. Reading should be infinity. If not, replace coil.
Factory Service Tools
Use the Manual With the Right Hardware
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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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