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 MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 54 (ENGINE CONTROLS - BASIC DIAGNOSTIC PROCEDURES - 7.4L)BASIC IGNITION SYSTEM CHECKSDISIGNITION COIL TEST
1998 Chevrolet Suburban K2500, 7.4 J, Part Time
Ignition Coil Test
1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Ignition Coil Test
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 1998 GMC Savana Special, 1998 GMC Savana Camper Special, 1998 GMC Savana, 1998 Chevrolet RV Cutaway, and 1998 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition off. Remove engine cover. Disconnect distributor lead and wiring from ignition coil.
- Place DVOM on high scale. Connect DVOM as shown in step 1 of illustration. See Fig 1 . If reading is not infinite, replace ignition coil.
- Place DVOM on low scale. Connect DVOM as shown in step 2 of illustration. See Fig 2 . If reading is not 0.1 ohm, replace ignition coil.
- Place DVOM on high scale. Connect DVOM as shown in step 3 of illustration. See Fig 3 . If reading is not 5000-25,000 ohms, replace ignition coil.
- Reconnect distributor lead and wiring to ignition coil. Install engine cover.
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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.