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I'm at a loss. I had a guy put headers on it and this is the out come...it's a 2003 supercrew with a 5.4. Nothing but headaches since the headers. I've replaced passenger side o2 sensor pre cat because it was smashed. It runs rough some times and other times runs great. It acts like it's defueling at a steady rpm then all of a sudden will just take off and run normal again
Last edited by 600hpdream; 03-16-2017 at 08:39 PM.
Reason: Not enough info
03-16-2017, 07:46 PM
A LOT of codes. Where should I start?
