Fuel pressure gauge

[littlebob]

Just saw a thread abought oil pressure gauge and got to wondering if anyone has fuel pressure gauges and where thier tapped into as far before primary filter, after secondary etc.
littlebob

 

[clinto]

If I were going to tap one in, I'd do it right before the injection pump. I have to assume there there is a range of acceptable pressure readings and if you aren't reaching that, you know you have a clogged filter(s), dying or dead lift pump, clogged pickup, etc.