I went about 2 weeks ago to get an inspection and it brought up the codes p0171 and p0174. i was told to get gumout and put in gas tank (rxp type stuff)... Well I ran the truck 50-60 miles and had it checked at autozone with their code scanner and it showed no codes. I then went back and had it re-inspected. It couldn't be due to Evap and Catalyst showing not ready so I thought that it was due to not driving enough miles. So I drove some more and yesterday had autozone check it again... No p0171 or p0174 codes came up, but now p0506 is coming up and saying idler arm valve issue, which I dont have.

I am going crazy trying to get this thing inspected and would love some direction as to where to turn next. (TB cleaning needed? PCV valve and/or tubing leak???)

I have not changed plugs yet and truck has roughly 130,000 miles.... please help because my inspection is 2 months out.... Thanks

 

https://www.f150forum.com/f4/inspect...s-help-109315/


Double post