OEM Ford Excursion Spark Plug

Ford Excursion Spark Plug Parts Questions & Experts Answers

• Spark Plug
  AGSF-22W-MX
  Q: How to inspect a spark plug for issues such as bridged gaps, deposit build-up, oil fouling, carbon fouling, normal burning, pre-ignition, overheating, and fused deposits on Ford Excursion?

  A: The gap of the spark plug needs inspection to ensure that deposit buildup does not block the electrodes since oil or carbon fouling might be present. Perform cleaning on the spark plug when needed. Assess the spark plug's condition by observing whether oil has fouled its electrodes through black wet deposits while inspecting for excessive oil flow into the combustion chamber triggered by ring/Piston wear or valve-guide clearance or worn/broken bearings and resolve any oil leakage before spark plug installation. To identify carbon fouling conduct a visual assessment of black dry carbon flakes on the insulator tips and exposed shell surfaces and electrodes. This measurement happens when the heat range is incorrect or air cleaners need cleaning or fuel mixtures are rich or engines idle excessively. Cleaning the spark plug might be necessary under these conditions. A normal burning spark plug will show its firing tip revealed light tan or gray deposits. Pre-ignition results in melted electrodes as well as damaged insulator destruction and metallic deposits on the insulator that indicate possible engine breakdown from wrong ignition timing or fuel type or unauthorized heli-coil thread installation which requires installing a new spark plug. Check for overheating symptoms that include white or light gray electrode spots along with bluish-burnt appearances because of engine overheating, improper fuel use, loose spark plugs, incorrect heat-range spark plugs, or low fuel pressure or incorrect timing, so replace the plug when overheating appears. The inspection of fused deposits is important because they appear as spotty bubbles or melted formations on the spark plug caused by sudden accelerator actions. If detected you should clean the plug.