Reinstalling Coil Electrical Connector Once completed, start the engine and observe the performance, if obvious problems exist retrace the pervious steps to discover a damaged spark plug, or ignition coil, or plug wire not correctly installed. Helpful Information Vehicles are equipped with many different styles of ignition systems, but all follow the same principal. A tune up is needed between 35,000 to 75,000 miles depending on driving conditions and car manufacturers recommendations. Before starting, determine the individual tune up parts. When performing a tune up avoid contact with undesirable components such as exhaust manifolds, serpentine belts etc.) Most spark plug gaps are pre-set and ready to install. Replace spark plug wires individually to avoid confusion, mark the wires clearly while confirming proper length of each wire, twist the wire boot to help break the seal which will assist in the wire removal. Inspect coil output terminals for corrosion as this will hinder performance.
- Remove debris from the spark plug well using compressed air.
- Inspect the new spark plug porcelain and isolator before installing.
- Use OEM (original equipment manufacturer) parts to ensure proper performance.