I have a fuel boss mechanical pump and I had an issue with some debris being stuck in the bypass valve, causing the fuel pressure to plummit. I cleaned it out and put it back together and everything seemed to be as normal around 18psi. Though, today when I went for a drive the fuel pressure jumped up to 45-50psi. Thinking the valve was stuck closed I opened it up to find all was normal. I know I've installed the valve in the correct orientation as well :/.
I'm at a loss at this point, can't figure out  why the pressure is so high! Any ideas? 
I drove for about 10 miles, how much harm could this have caused at 45psi?
Thanks 

Went to road test the truck today for a transmission problem and the check engine light was on.   Installed code reader and had P0230.   I forgot that I had pulled the lift pump relay to see if the check engine light would come on.  So, on my truck it does.

 

Even my truck does too. It will toss a P0230 code if there isn't proper resistance on the lift pump circuit. I understand for guy like you in the California area you need to be error code clean!

 

Edited April 14, 20196 yr by Mopar1973Man

Washington is getting rid of smog checks in 2020. I have had a code and it passes every time. I just say let's see if it will pass and knowing it will. 

So I installed the new fuel pressure sensor system with about 5' of air lines, needle valve + snubber, and PTC fittings. Everything appears to be back to normal! Pressure is steady around 17-18psi cruising around. Definitely not fluctuating as it use to from the pulses. 

Thanks Moparman for showing your set-up. Mine is definitely not as clean/organized haha

1 minute ago, CAMG3X said:

Thanks Moparman for showing your set-up. Mine is definitely not as clean/organized haha

 

My problem is I spend so much time studying how I'm going to do a modification or addon that it ends up taking serious extra time and part digging. Then figure out how I want it set up. Then actually building the setup. Some times it takes several months...