2004 f150 5.4 runs great when cold and down the road until warmed up and is intermittent then sounds like a diesel. Was told it might be cam phasers but have to believe it is the VCT seleniods. Have not cleaned throttle body, MAF yet. Also have rough idle when the noise appears. Codes include p0022, p0171, . Other codes that appear but have not checked spark plugs, etc, 0300, 0305, 0307. My concern is the ticking or knocking sound. VCT or Cam phaser
have the same problem?
Sunday, February 14th, 2016 AT 7:48 PM