to check the fuel pressure in a TPI engine, you just need to disconnect the line running to the fuel rail,and connect the gauge in place don't you?

 

No, there is a schrader vavle on the fuel rail. See pic, it's on the top.right in this picture.

 

ok, yeah I just went out to my car and found it, its on the passenger side near the back, thanks for the quick reply

 

does the fuel go to the regulated first or to the fuel rail?

 

wow this is old, the fuel enters the rail first. The regulator is used to create a restriction at the return side of the rail and this makes sure that there is adequate fuel pressure throughout the entire rail

 

This might help:

 

I have simialar symptoms on my 91 tpi 5.0, its struggles to start like yours then eventually after about 3 tries it turn on but it has a rough idle and wants to bog out, as soon as i step on the gas pedal it shuts off. I also think its my fuel pump which ima change next weekend hopefully it gets my car on the road. Thanks for posting the video

 

I have videos on the fuel pump and the filter.