I have a f150 4wd with a 5.4. Modifications are Hooker shorty headers, cat-back exhaust, bbk 75mm throttle body(with manifold ported to match), K&N coll air system. I purchased a new 80mm MAS and every time I install it I get an error code of Lean condition in bank 1 and lean condition in bank 2. I have sent it back to the manufacturer twice for re-calibration and they have re-calibrated it but have said it looks fine. WHY AM I GETTING A LEAN CONDITION!!!!!!! DO I NEED TO DO SOMETHING WITH MY INJECTORS BECAUSE THEY CANT GIVE ME ENOUGH FUEL???????SOMEONE PLEASE HELP....... WREUCK@YAHOO.COM

 

It sounds to me like you need to call someone( Mike Troyer) and get yourself a tuner for the mods you have installed on your truck. Its seems you are not getting enough fuel to compensate for the mods. Good luck.