4.6 check engine

  1. P

    Help!! Open Injector Circuit Codes

    I recently bought a 2004 “v6” but it turn out it had an engine swap to it aftermarket halos and a swapped transmission. The engine was a 99 Gt. I can’t figure out why these open injector codes keep popping up and I can’t get a smog with them. Do you guys know how I can fix this?
  2. D

    Washed engine bay on 3 valve mustang

    I’m not quite sure what’s wrong it’s been almost two weeks and I’ve had it diagnosed showing it’s misfiring on 5 different coil but they’re all good and got new spark plugs and still runs reall rough like it’s to rich or too lean. When I give throttle it’ll just putter real hard or die...
  3. R

    Need Help With 4.6 Emission Problems

    I have a check engine light on a 1997 Tbird 4.6 which I am having difficulty resolving. I have been on a Tbird site for a while but I am getting some confusing suggestions, so I thought I would check out the Mustang experts. The 97 Bird 4.6 has 201,xxx miles. DTC codes P0172 and P0175 "rich both...