sr20det s13 starts up but wont stay running

[Reos77]

I have a sr20det redtop in an s13 hatch. The motor turns over but won't stay on. It stays on when you give it gas and keep the throttle open, but when you get off the pedal it dies.

I have an adjustable fpr and a walbro fuel pump.
I have read over tons of post and checked everything I can think of.
Can anyone help me out with suggestions:confused:?

[MAPERFORMANCE]

Is your MAF plugged in? Clean?

Vacuum leak?

Was it running before and now it wont? Or first start up?