Ok, I am looking for a thread-in type of fuel pressure tester port. The same size and style as the one of the fuel rail with the schrader valve. I dont know if any companies make any inline pieces with one built in, or possibly one with a NPT thread on the other end? I've been searching and haven't found anything yet. I am interested in making a test port back at the fuel pump assemblies outlet so I can check for pressure drops and such.

I have found this link so far but I still dont know what size the fuel rail fitting IS. I believe its a 4AN fitting with a standard schrader valve but I'm not certain.

http://www.container.carrier.com/Files/Container/Global/US-en/Tool4.pdf?SMSESSION=NO

Any insight would be appreciated. Thanks.

Originally posted by jack_of_trades

I believe its a 4AN fitting with a standard schrader valve but I'm not certain.

Yes it is. THis will give you an idea on how to set up a basic mechanical fp gauge at the test port.

http://www.2gnt.com/index.php?d=Fuel%20Return%20Line%20Set%20Up

not sure if this is really what you were looking for, but it might help.

Well, I found a test port with a 1/4 NPT fitting today and all I need is a T-fitting to go inline with the fuel ine coming off the pump assembly. I believe the fuel line and the pump assembly threads are 1/4 NPT but I wont be certain until I can disconnect it. This weekend I should have a working part and pics. No more guessing if I have a restriction causing my fuel pressure to drop :)