How to Deal with Misfiring Cylinder Issues?
1 Answers
To address a misfiring cylinder issue, a thorough vehicle inspection is required. The specific steps are as follows: 1. First, inspect the misfiring cylinder. Use a flathead screwdriver to ground the spark plug terminal nuts one by one and observe the engine's operation. For a cylinder that was already misfiring, grounding it will not change its operation. If the grounded cylinder was functioning normally, the engine's power will noticeably decrease, and uneven operation will worsen. 2. Alternatively, you can determine the non-functioning cylinder by checking the temperature of the spark plugs—a colder spark plug indicates that the cylinder is not working. Once the non-functioning cylinder is identified, remove its high-voltage spark plug wire and hold it 3-4mm away from the spark plug. Turn on the ignition switch and observe the spark. If there is no spark, slightly pull the other end of the wire out of the distributor socket and check if the adjacent socket sparks to the wire. If it sparks to the wire, the wire is leaking electricity. If there is no spark, inspect the distributor cap's adjacent socket for leakage (you can remove the central high-voltage wire from the distributor cap, insert it into the adjacent socket of the cylinder, and turn the crankshaft to observe the contact gap when the cam lobe acts). If there is a spark when the cylinder's spark plug wire is removed and the engine speed evens out, it indicates excessive carbon buildup or minor leakage in the spark plug. If there is a spark but the engine speed does not change, the spark plug is severely leaking electricity, and it is recommended to visit an auto repair shop promptly for inspection and repair.
