SHES WORRYING ME SOMEONE HELP

[nissan_is_supreme]

when i start my car it runs fine for couple of seconds sometimes, then it will idle at a lil over 500 rpms, and my oil pressure will be anywhere from just under 20psi all the way down to 5psi, someone please tell me what the possible prob....if it helps i got a 195 degree thermostat in it right now. and my HVAC control box will only blow at number 4? puzzles the heck outta me....wiring seems to be fine, took AC system out....? and when i have my foot off the gas pedal my e-brake light lights up and my batt light also does(very dim), but yet when i gas it a lil bit you can hear a buzz sound from behind the kick panel, took the kick panel off and found nothin that could cause it to do that(figured it was a bad ground)have yet to take dash out for further examination....(also started thinkin maybe it was because it was of my JDM instrument panel?)

PLEASE SOMEONE HELP US i need this car to last me a lil bit longer

[s13sr20chris]

ok, forgive me for saying lets start with the biggest problem. we need to get her running good first. can you keep it running by holding the gas pedal? if so, will it idle better when its warmed up? try unplugging the maf and o2 sensors to see if that helps it stay running.

[nissan_is_supreme]

the car will run ok without holding the gas down....and after it has warmed up for a lil bit it will start idleing at 500. i tried unplugging the maf and it still ran ok...gave it a lil gas and it wouldnt go over 3000....when i unplugged the o2 sensor i really couldnt tell a difference....(i had thought about replacing the fuel filter)...but other than that it will stay running, it just idles very low....and my oil psi really bothers me.

[s13sr20chris]

hot idle oil pressure is always low but you will have less at a really low idle. so its basicly just a low idle problem? ok, start by turning the idle up with the idle screw. if that fixes it and it runs good then great. if not tell me what happens.

[nissan_is_supreme]

ok i git my car to idle at about 750-800 rpm, and still my oil pressure is low. it used to be at like 40psi and like out of nowhere it dropped.im really worried about it being that low

[s13sr20chris]

best bet, change the oil. at warm idle it will only be like 10-20(iirc)