Inspect and replace, if necessary, the ignition coils Ford F150
Note: On 3.3L and 3.5L non-turbocharged V6 engines, the upper intake manifold must be removed to access the right-side ignition coils (see V6 engines).
1. Clean the coils with a dampened cloth and dry them thoroughly.
2. Inspect each coil for cracks, damage and carbon tracking. Make sure the coil fits securely onto the upper spark plug and the electrical connector connects securely to each coil. If damage exists, replace the coil (see Replace the spark plugs).
3. It’s also a good idea to apply a small amount of dielectric compound to the opening of the coil boot (where the spark plug fits into) before installing the coil onto the plug. This will ensure a clean coil-to-plug connection.