suspected MAF problem

[dastang2]

hello, my 95 is one big piece and i need to figure something out. the rear of the car was submerged under water, so that wrecked the PUMP,FILTER,INJECTORS and PLUGS. i put a new holley 110 pump with a filter, and i had some good spare injectors so i put them in along with plugs and wires. i also put a spare regulator on it. it is seriously lacking low end and sometimes tries to stall along with its missing idle. it also now has a hanging idle sometimes and won't go down to about 800rpms for at least 15 seconds. now i heard when you unplug the MAF while it is running, that is will start to idle very low and crappy. i tried this a long time ago and it did just that. i did this yesterday and the car idled up maybe 50 rpms and idled better it seemed. i did not try to drive it like this but it idled a little better. i was wondering why i did not get an even more crappy idle. the air filter is good. and the wire filiment is clean. i am only getting one code which is an o2 code for the drivers side, but this has been going on before that, i think that code is coming up because of this other problem that is not showing a code. does this sound like a bad MAF sensor. is there a way to test it. is there a way to test the o2 sensor as well. i am going to try to switch the location of the o2 sensor to another location to see if it changes, that will tell me if it is indeed the sensor instead of another problem or a wiring bug. oh i also have a whistle coming out of the TB. everything is stock but i have had the TB throttle shaft out, but i don't think it is leaking since i sprayed starting fluid all over the engine to find any vacuum leaks. when i barely open the throttle, the whistling starts and it is loud, like a supercharger. when i open a bit more, it stops but while driving it comes and goes with the rpms. the plugs are the normal color and gapped at the right size. i got dual exhaust but one of the mufflers fell off after the last cat on the drivers side and the other has a huge gaping hole in the bottom.

 

[dastang2]

i also checked the fuel psi yesterday and i am getting around 30-32 psi at idle and when revved it goes to about 40 and then back to it's original spot. this is really affecting the whole rpm powerband instead of just low end like i said earlier.