Keeping new plugs and coils installed and 50-75k mile intervals is cheap insurance for your engine.ĭue to the heat from the coils and a specialized spark plug Ford has had a slew of issues with the plugs.
You may notice a jerking or bucking that can be mistaken for transmission issues. When a failure happens you may experience cylinder misfires especially during accelerating or around 50 to 60mph in overdrive. Another issue we see is oil or coolant can make their way into the boot and that will affect the performance of the coil. Preventative maintenance of plugs and coil boots can ensure no issues arise, the rubber that covers the spring at the coil output prong to the spark plug can deteriorate with age and weak spots in the rubber can cause the spark to jump to the plug well instead of the spark plug. The design is very efficient but can lead to excessive heat. Each cylinder has a separate coil that fits onto the spark plug. The 3 valve 5.4L Triton contains a coil-on-plug design. The most popular issue but easiest to fix, is the ignition system. Most of the most common problems developed with the 2004-2013 3 valve engine but some problems spanned all engine generations. Ford’s flagship V8 has been around since 1996 with the 4.6L that led to the 5.4L.
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