Yesterday I had a problem where my 91 z (305 tpi) wouldn't rev past 3000 then wanted to stall out. so, I posted the symptoms here:

https://www.thirdgen.org/forums/tpi/...ml#post5712113

got some feedback and started working on it.
Today, a whole new set of problems (which is why I am doing a new post about it). Now it no longer has the symptoms of my original post and will hardly run at all.

key on engine off it I get 20 psi then drops to 0.
do above the second time, get the same thing.
car will start, cranking time is normal. running fuel pressure is about 20-25.
if I pull the vac line off the fpr, no change.
if I pinch the return line while running, it shoots over 60.

If you look at my original post from yesterday (link above) you can see how the problem started.

I am thinking it is a bad fpr. does this make sense? is it possible a bad fpr damaged my new pump?

 

been a couple day; anybody got any suggestions on this?

 

I'd definitely feel the FPR is bad, (as TP mentioned in your original thread).

 

Got a new fpr today. I'll let you know if that was the problem. (might be a couple days before I can swap it out though)