2005 Ford F150 5.4l. Having severe issues and been trying to repair them for months. Codes p0171 p0174 p0191 p0300 p0306 p0301. Both banks lean. I've already replaced all plugs and coil packs as well as the fuel filter, maf sensor, fpdm, fuel pressure sensor. Still having the same issues. I have a severe loss of power and can barely touch the gas peddle before it starts bogging out. Thinking of replacing the fuel pump and tps but didn't want to just throw more money at issues I'm not sure of. Any help would be greatly appreciated. Had to replace the knock sensor last year so it has new manifold gaskets as well.

 

Reconnect MAF connector and tighten air intake hoses.

Check and make sure the vacuum line to the brake booster is connected at the back of the engine and not rotted through.