Ignition Coil Testing 101: How to Diagnose a Failing Coil

Ignition Coil Testing 101: How to Diagnose a Failing Coil

Ignition Coil Testing 101: How to Diagnose a Failing Coil The short answer: diagnose an ignition coil in three layers — a multimeter resistance check (primary 0.4–2.0 Ω, secondary 5–15 kΩ), a live waveform check on a scope or graphing multimeter, and a physical swap test between cylinders. Resistance testing alone misses the most common […]

Why Your Car Misfires in Cold Weather: Causes, Fixes & Prevention

Why Your Car Misfires in Cold Weather: Causes, Fixes & Prevention

Why Your Car Misfires in Cold Weather: Causes, Fixes & Prevention The short answer: a cold-weather misfire almost always comes from one of five places — a failing ignition coil, worn spark plugs, a weak battery, poor fuel delivery, or an air/vacuum leak. Cold air is denser and demands more ignition voltage, so components that […]

Fall Car Maintenance Checklist: 10 Checks Before Winter Arrives

Fall Car Maintenance Checklist: 10 Checks Before Winter Arrives

Fall Car Maintenance Checklist: 10 Checks Before Winter Arrives The short answer: before temperatures drop below freezing, run through 10 checks — battery, spark plugs and ignition coils, brakes, coolant, tires, wipers, oil, lights, belts and your emergency kit. Most winter breakdowns are caused by neglected ignition and battery systems, and all of them are […]

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