OEM 2005 Ford Five Hundred Spark Plug

2005 Ford Five Hundred Spark Plug Parts Questions & Experts Answers

• Q: How to inspect a spark plug for issues such as bridged gaps, fouling, and overheating on 2005 Ford Five Hundred?

  A: Examine the spark plug for a bridged gap to check for deposit accumulation that could close the plug electrodes and inspect for signs of oil or carbon fouling. Regular cleaning procedures should be applied to the spark plug as needed. Assess fuel leakage indications through black wet deposits on the spark plug directly onto the insulator shell electrode bore because of excessive oil entry into the combustion chamber caused by ring and piston deterioration and defective valve-guide clearance or worn loose bearings. Additionally address any oil leaking issues before spark plug installation. The presence of black dry carbonaceous deposits on insulator tips and exposed shell surfaces and electrodes requires new spark plugs when carbon fouling develops from heat range errors or poor air cleaner condition or fuel mixtures or excessive idling. Normal burning results in light tan or gray deposits which should be found on the spark plug's firing tip. Engine damage will result from incorrect ignition timing or using the wrong fuel type or installing a prohibited Heli-coil insert into the spark plugs. These issues will manifest as damaged insulators and melted spark plug electrodes showing metallic deposits in addition to requiring immediate spark plug replacement. Engine overheating along with wrong fuel type combined with loose spark plugs and improper spark plug heat range or insufficient fuel pressure and badly set ignition timing all result in overheating that creates white or light-gray spots and blue-fire affected electrodes, therefore requiring a new spark plug installation. The last step in the spark plug check involves examining fused deposits that look like bubbles or blisters located on spark plugs following sudden accelerations until a replacement is necessary.