2006 Supercrew XLT. 4.6 liter. Replaced fuel pump several months back and now get check engine light and the code is 505. Is this something that needs to go to a dealer or can a good independent shop with good diagnostic equipment track this problem down. Start is sluggish and initial acceleration stutters a little and then after that it runs fine.

 

P1505 code is the closest I would guess at. It's an IAC fault, and it is IAC error at adaptive clip

http://www.obd-codes.com/trouble_codes/ford/

 

my reader is a cheapo from AutoZone and it doesnt show a 1505 so that makes sense-the idle is I assume part of the problem-at least anything low speed. On the road it runs great and mileage hasn't changed. I have had some 300 codes which I assume are related to this start and idle issue. Any thoughts you have would be appreciated. Plugs were changed a few months ago and i couldn't tell any difference. Truck has 116,000 miles.

 

post up the codes, my link gives you the engine codes, I'd just add the 1 to the front and see what you get.

 

OK thanks. right now jus have 300,301, and 305 which i understand to be misfires. will see if anything else comes up...