Z32 NA Flooding.

[InOverMyHead]

Bought a 1990 300zx NA a few days ago and noticed it seems to be running rich, and is flooding all six cylinders. If I take the time to clean all the gas soaked spark plugs and pin the throttle to the floor it'll start right up and run. But the moment it's shut off it refloods.

Since it's on all six cylinders, I highly doubt it's the injectors, (also listened with the old screwdriver trick and hear all six clicking) so I'm not sure what else could cause this issue. I'm considering just buying a new set of o2 sensors, fuel pressure regulator, and a coolant temp sensor. Any advice?

[itsa300zx]

Only 2 ways for fuel to enter the cylinder, thru the injector or around the injector via rubber seals.
Possible all the rubber seals have gotten hard and leaking.
Another way to let fuel into the cylinder via intake is the regulator, if the diaphragm is cracked, less likely though.

[InOverMyHead]

Only 2 ways for fuel to enter the cylinder, thru the injector or around the injector via rubber seals.
Possible all the rubber seals have gotten hard and leaking.
Another way to let fuel into the cylinder via intake is the regulator, if the diaphragm is cracked, less likely though.

Also it kicks on fine after sitting for a while or if I clean off the plugs.
Would that cause it to be running rich too?