What Causes Multiple Cylinder Misfires in Cars?

1 Answers
StPaul
07/30/25 3:05am
Reasons for multiple cylinder misfires in cars are as follows: 1. Electrical wiring issues. 1.1 Aging or leaking electrical wiring, causing intermittent ignition faults. 1.2 Faulty ignition coils or spark plugs, resulting in poor ignition or conduction. 1.3 Loose wiring, exposed wires grounding, etc. 2. Fuel system issues. 2.1 Insufficient fuel injection pressure due to faulty electronic fuel pump. 2.2 Blocked or contaminated fuel lines, leading to poor fuel supply. 2.3 Faulty or clogged fuel injectors. 3. Engine-related issues. 3.1 Wear and aging, delayed maintenance, or use of substandard or low-quality engine oil. 3.2 Excessive wear causing cylinder pressure to fall below normal values. 3.3 Aging belts or incorrect ignition timing.
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