Clogged fuel filter: A clogged fuel filter can restrict fuel flow to the engine, causing it to skip and run rough.
Faulty fuel injector: A faulty fuel injector can cause the engine to skip and run rough by delivering too much or too little fuel to the cylinders.
Low fuel pressure: Low fuel pressure can cause the engine to skip and run rough by not providing enough fuel to the cylinders.
2. Ignition System Issues
Faulty spark plug: A faulty spark plug can cause the engine to skip and run rough by not providing a strong enough spark to ignite the fuel in the cylinders.
Faulty spark plug wire: A faulty spark plug wire can cause the engine to skip and run rough by not delivering the spark to the spark plug.
Bad ignition coil: A bad ignition coil can cause the engine to skip and run rough by not providing enough voltage to the spark plugs.
3. Vacuum System Issues
Leaking vacuum hose: A leaking vacuum hose can cause the engine to skip and run rough by allowing unmetered air into the engine.
Faulty vacuum check valve: A faulty vacuum check valve can cause the engine to skip and run rough by allowing vacuum to leak out of the system.
4. Engine Mechanical Issues
Worn piston rings: Worn piston rings can cause the engine to skip and run rough by allowing too much oil into the combustion chambers.
Faulty valve: A faulty valve can cause the engine to skip and run rough by not opening and closing properly.
