ok, after a recent rebuild, my motor is running, but the idle is rough, and it wont idle on its own without having to feather the gas to keep the motor running. Otherwise, its just stalls out.

extra parts and mods after rebuild:

2nd stage street port, upgraded fuel pump and cleaned/benched injectors, PWR radiator, higher pressure oil pedestal.

My check engine light is on, diagnosed with numbers 23 and 27, which is the fuel thermo and oil metering pump (cant remember which is which). both were apparently plugged in and the connectors were fine. Is there a way to test if the actual part itself is bad, aside from running it and finding out the hard way? Is it okay to be running the car like it is, with its rough idle, and dying out like that? Oh, and one last thing, my mech did say that my battery was only holding about 9 volts, so this may be part of the problem from what I would say. But he said that the check engine codes only have 5 volts running to the sensor wires, and they are getting voltage btw. Sorry about being so disorganized with my question, Im tired of dealing with this problem.

If anyone can make sense of this post, please feel free to make suggestions. Thx for any in advance.