what would cause the idle to lower this much?

[bmxfelon420]

Ever since i've had my car, it has idled way too low, sometimes lower than the tach can read. The other day i was at a stop sign and it got reaaaaly low and stalled. When i started it back up it was idling really low still and shaking bad (i need new motor mounts) so i pulled over and checked my oil, coolant, and made sure i didnt have any belts coming off or anything. It didnt, so i started it again, and it idled fine. It hasnt done that since, but what could be causing that? EGR, or FITV? I dont have a swivel socket to check the egr, but i could clean out the fitv if that could be causing it. My idle adjustment screw is stripped and doesnt turn right when i can get it to move in my throttle body so i have another TB on the way. Would checking these things i've mentioned cover my problem, or does anyone have any other suggestions?

[wed3k]

when warm, unplug the IACV and adjust to 650. turn off engine. plug iacv back in and start the engine. it should read 750rpm.

get a more reliable tach, i dont trust those 20 year old guages.

[bmxfelon420]

people would probably make fun of me with it on an auto, but screw em. I heard that the stock tach isnt accurate under 1k anyways.

[bigbadnothing85]

the tube seals in your valve cover... if oil leaks down onto the plugs and wires, it WILL fugg with your idle, hardcore... i feel ya with the motor mount issue, i just went through it... and with the new mounts installed so the motor doesn't shake, helped my idle too

[bmxfelon420]

that might also explain how i'm losing oil. I have another set of lower seals, i guess it's time to get to work.