Bowser

i just swapped in a jdm s4 13TII into my 88 n/a rx7 and i also put a walbro 255lph fuel pump in it also and right it does start up just have to press the gas a couple times and starts but 3 seconds later it stalls out doesnt idle or stay started even if i hold the gas down and also i have no fuel in my return line only im thinking that could just be a bad fpr but im not 100% sure about that thnx 4 any help

Fabrik8

Install a fuel pressure gauge. It's good to have one any time you're messing around with fuel system changes.

I've never messed with really old rotary stuff, I'm assuming the engine you swapped in is fuel injected?

Bowser

ya it is im about to install a fpr in it in a couple days and see how that works