Fuel leaking into intake manifold

I have a 95 Achieva S with a 2.3 Quad 4 with multi port injection. It started becoming hard to start. Puffs of white smoke when it did start from the tailpipe. Pointing to what we thought were stuck injectors. We took the fuel rail off to try and soak the injectors in cleaner and when we disconnected the air duct from the throttle body it had over a pint of fuel in it. Not sure but I think it was the MAF box?? wire grid inside and hooks directly onto the throttle body. What else should I look at regarding the fuel leaking into that area. If the injectors were closing it would not be leaking as fat as I know.

Watch for fuel in the oil also here, sounds like the engine is flooding, possibly an injector stuck open.

Possibly a bad fuel pressure regulator? That has a vaccum hose running to a port on the intake manifold.

is there a way to test the fuel pressure regulator?

we soaked the injectors in injector cleaner and if I have time I will put it back together this weekend.

Pull the vac line off the regulator , turn the ignition to on(not crank),let pump build up pressure in the gas line, check to see if gas is coming out of the reg where the vac line hooks on.

if the regulator is bad will there be gas coming out or no gas?

I took the vacuum line off, turned the ignition to on and it sprayed gas out so i am assuming that the regulator is bad and that is why the manifold filled up. I will replace it tomorrow.

the fuel pressure regulator took care of it.

Great! I wish ALL car probs were that easy to fix.