BMW 530xi Spark Plug
Diagnosing BMW 530xi Spark Plug Problems
Once the spark plugs of your BMW start acting up, engine problems usually follow soon after. Wire damage, spark plug failure, and the ever-common wear and tear are the usual culprits. To learn more about BMW 530xi spark plug issues, read on.
Sparks and crackling noises in the engine compartment are the symptoms of this problem. This is usually evident when you start the engine. This happens as a result of damaged or worn-out wires, whose metal interiors have come into contact with the engine and its other metal components. You can use an Ohm meter to test out the wire and the plugs. Wires should typically show no resistance at all; any resistance reading means that electricity is leaking out of the wires. When testing the resistance of the 530xi, be sure to get the correct resistance rating from any repair manual and compare it to the Ohm meter readings you've taken.
Difficulty cranking and engine misfiring
Check all of the wire connections leading to the spark plug. Any loose connection could prevent electricity from getting to the spark plugs, causing the engine to misfire. Check for any significant damage to the wires as well and be sure to replace any damaged wire that you see.
Other trouble shooting tips
Remove the spark plugs to have a better look at their condition. You only need to pay attention to the electrodes at the plug's tip. Black carbon deposits at the electrodes are caused by a dirty fuel-air mixture caused by a clogged air filter or low-quality fuel. If the spark plug has white deposits on it, it means that it has too much insulation and that it's unable to burn this away. If the spark plugs look a little too shiny or glossy, there might be too little insulation, making the spark plugs overheat. Oil covered plugs means that engine oil could be getting into the engine, a condition you need to inspect immediately.
Check the gap of the electrodes as well. If they're too far apart, this hampers the plug's spark generation, leading to poor starting and slow acceleration. Use a pair of pliers or a gapping tool to adjust the gap. Be sure to follow BMW recommendations.