Hey guys, I have an 03 king ranch supercrew 4x4 with the 5.4. 131k on it. When cruising at 65 or so, and if I come up on a hill the engine/tranny starts to skip in stumble a little bit. It happens right around 1500-1900 RPMs, and it goes away if I give it gas and get it to shift down. Had it checked out yesterday and cylinder one was misfiring so we replaced the plug, and she runs a little better but still has a bit of a skip. Hooked the scanner up to it and now it's throwing a PO 500 code and a B1450 for the speed sensor. Have any of you guys had this problem or issue, any thoughts, advice or tips would be greatly appreciated. Thanks

 

Change the #1 coil.

 

Change the speed sensor in the Diff. Along with #1 coil pack. It may just be time for plugs.