01 cummins 24 valve think fuel pressure sensor is acting up
 

Hey guys, so I just bought my first cummins
A few months ago. It just had the fuel pump and lift pump done, it also had a low fuel pressure sensor added I believe and I noticed that before I start it when I just turn the key it flashes. And it doesn't flicker again unless I really stand on it but when I do nothing changes it doesn't cut out or anything weird it just flickers till I let off. Is this a problem ? Can some one tell me what may be going on.

if you had a stock lift pump installed it may not be pushing enough fuel ,need a good aftermarket pump,airdog ,fass ,to really be safe:w2: