2001 Ford Explorer Sport Trac Fuel Pump Replacement?

My 01 Sport Trac has been giving me problems. At first it took a while to start after turning the key so I thought it may be the spark plugs, but before I could take it in, it went to barely being able to start and as soon as I gave it gas it would die. I got the error codes read from Auto Zone and it gave me 2 codes. P0113, which is intake air temperature sensor circuit high and the other code is P0101, which is mass or volume air flow "A" circuit low. I took the vehicle to a mechanic and he measured the pressure of the fuel pump and told me that I needed a new fuel pump. I had the fuel pump replaced less than 5 years ago and have only put on about 35,000 since then. When the mechanic got under the vehicle to drop the tank and replace the fuel pump he said there was a kink in the plastic line that runs along the fuel tank(I would assume this is the fuel line). He said unlike a rubber line he couldn't just straighten it out and would have to put in a new line. That's where I stand right now and I guess I have 2 questions. First, is it true that a bad fuel pump could throw other components out of whack and cause these other error codes? Second, could a kink in the line be the problem and not the fuel pump itself so that if the line is replaced that may fix the problem? I would assume that it would be a lot cheaper if it's just a line that has to be replaced instead of a complete fuel pump with fuel filter.