Yesterday I noticed the my HPFP (High Pressure Fuel Pump for all the new owners) was excessively noisy! It was probably about 3x louder then I've ever heard it. I actually thought I had a valve stuck at first it was so loud. Even after the initial pressurization (where it ticks really, really fast) it was like I had an old fashioned clock sitting on my dash in front of me...tick...tick....tick. I used my Torque to look at fuel pressure and it looked good. But I did notice that my cat didn't warm up like it has in the past (about 290 degrees centigrade, it's usually around 400+ at idle) until I started driving. And the a/f mix was a little high...about 24 when cruising and about 14.5 when idling. Should I be worried about my HPFP? Was it a sign of things to come?