I connected a inline fuel gauge up to my 76 280z l28e and found my fuel pressure at idle is 100 psi.I also noticed my return line had swollen.So I took the hose off of the tank and the fuel rail then blew air from the return line to the tank and junk came out of the lines so I hooked it all back up and no change the return line is still swelling.It sounds great when you first start it and no smoke but after a few min. It start loading up with fuel and it sound like it has a big cam in it and starts smoking bad. Could there be a blockage in the tank?What should I try? What does the fuel pressure need to be?Could it be the fuel pressure regulator?

If the gauge is hooked up properly, that is, between the fuel filter and the fuel rail, I would rule out any kind of blockage if you're getting 100 psi. I would suspect the fuel pressure regulator. The pressure should be 36.3 according to the FSM.

Make sure that the vacuum line between the fpr and the manifold is good and that the fpr itself holds vacuum.

Is this picture from another of your posts a picture of your engine?

If so, are you attempting to run the EFI fuel pump with those triple carbs? Won't work.

Edited March 31, 200915 yr by sblake01

No thats my other engine. In my 75 I sold the carbs about 3 months ago. I only had like 6-9 psi on those.I checked today and im getting the same psi on the return side.

Edited April 1, 200915 yr by 1rad280