Ahh, the dreaded Ford "3 Valve" 5.4 V8 and it's ludicrous spark plug design. Available from 2004 (except the Heritage model) through 2008ish in Ford's full size SUVs and F-Series trucks, these engines are overall very durable and reliable. These spark plugs have stricken fear into the hearts of many DIYers (and some seasoned technicians!) … Continue reading Tech Tip Tuesday: Ford 5.4 Triton spark plugs