Can bad spark plugs cause timing issues?
Can bad spark plugs cause timing issues? If the spark plug fires too soon or too late during the compression stroke, damage to the engine can occur over time. Can ignition timing cause backfire? 3. Bad Ignition Timing. However, if the spark timing isn't just right, the spark could fire too early before the intake valves are closed, or too late when the exhaust valves have already opened. When this happens, the air/fuel mixture in the exhaust or the intake can combust, leading to a backfire. What should I do if I have a misfiring spark plug? If you have...