What Causes a Car Engine Misfire?

1 Answers
DeElliot
07/25/25 3:48pm
The causes of engine misfire in cars are: 1. Low cylinder pressure: Poor sealing of pistons, cylinder walls, valves, or valve seats leading to insufficient cylinder pressure causing misfire. 2. Distributor cap contact erosion: Severe burning of contacts in the ignition system's distributor cap resulting in misfire. 3. Air leaks: Air entering the cylinder through leaking pipes causes engine malfunction and misfire. 4. Low spark plug heat range: Excessive carbon buildup from low heat range spark plugs leads to spark plug leakage, weak spark, or complete failure causing misfire. 5. Carbon-clogged fuel injectors: Carbon deposits blocking fuel injectors prevent precise fuel injection and atomization, potentially causing injector seizure and misfire operation.
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