I installed glowshift gauges about 4 months ago and now my fuel pressure gauge is bouncing all over the place. I have it setup with a banjo bolt and stainless braided line from the bolt to the 30 psi sender. When i first put them in i had a slight feather from the pump pulses, and stayed at about 10psi. now at idle it reads anywhere between 5-15 psi and on decelleration it jumps up to 30 and on accelation will hit zero and on steady throttle while driving goes anywhere from 10-30 psi. Does anyone have an idea how to steady the gauge out?

 

you need to install a new sender and this time add a snubber. auto meter brand snubber is available from napa, car quest and others.

 

sounds good at 4 months old though I need a new sender?

 

The glowshift gauges are crap. My FP gauge cost 167$ because it uses a transducer, not the bell shaped resistive sender.