fuel pressure gauge what size & where to install

[bigfish]

looking to put in fuel pressure gauge what is better rail pressure or pump pressure to moniter just want to make sure of no lift pump failing causing other probs.:thankyou2:

 

[Pooter]

Id start out with a fuel pressure guage, then move up to a rail pressure guage as you get more serious with the mods...

Heres one way to tap for fuel pressure at the stock filter canister.
http://www.dieselmanor.com/diy/CMS3-gauge/G3image18.htm

Some also tap the cp3 for a reading after the filter.