I loved the 4100, right up until the day it died, less than one year of service. PE stood right by their warranty word, overnighted me a new
Purple 4200 which I promptly installed. The new 4200 is quite a different animal, compared to the 4100. The FP is very 'active', especially when the fuel is cold ( outside ambient below 10F). At the cold temps. , I see around 15 psi's at initial start up/idle. After about 45 minutes of driving, the FP settles down and stays around 20-26 psi's. Now that it finally starting to warm up here, with morning lows in the teens and lower 20's, I see around 18 psi's at start up after sitting for 8 plus hours, the FP ramps up to 25-26 psi's after only a short trip.
PE does seem committed to our cause. When they overnighted the pump they requested that the charge be placed on my card, which they promptly removed when they received the failed 4100. That, coupled with the fact that the pump is
purple 
, is enough for me to keep running them for now. Hopefully, the newly devised internal bypass in the 4200 series will last, time will tell.
There has been one failure that I know of with the 4200 pump. His was a first generation 4200 and I'll PM the owner to see if he wants to jump in with the details. All I know is that it didn't last long at all.
Scott W.
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