I have a 99f150 V6 4.2. I have a lean code bank 1 popping up. I've changed the vacuum lines which had hole in it to brand new lines (if anyone has a diagram of how they are supposed to be ran that would be great if you can send me it or post it here) , new fuel pump, filter, fuel pressure regulator, cleaned injectors.... I also got a new mass air flow sensor, cleaned the throttle body, checked intake for cracks, new spark plugs and gapped them to spec, new coil pack..... Just trying to see if anyone would know of something I missed because the engine code is still popping up.... Can 1 single injector not be getting power? How can I check for that?... I also took it and had the cats checked and they told me passenger side was bad. I cut out the cat and straight piped it... When I'm driving i don't really have power at around 55mph and hard to get above that. ... I know I asked a million questions but maybe some one might be able 1 of them. Thanks in advanced

 

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Please check this forum for more help on your specific year truck.

https://www.f150forum.com/f6/