2004 Explorer XLT, RWD, 143k miles, 4.0L SOHC, 5R55S trans.
Spark plugs (OEM) have about 20k miles on them. Crank position sensor has been replaced (OEM), harmonic balancer (OEM), and throttle body assembly (OEM).
EGR (Advance), fuel filter (OEM) also replaced, and cleaned the throttle body.
It...