really low idle, HELP!

[mustangmat99]

this is like the 3rd time i tryed posting this, maybe i should take the hint but...sometimes during idle at a light my rpms will drop down to around 4 or 500, sit there a bit and then bounce back up to around 1000, usually i give it gas before it shoots back up just because i dont like my car feeling like its chocking to death...whats causing this? also i notice if im idle and i turn the wheel to either side i notice the rpms drop, not normal droppage, like 400 drop, whats the deal? thanx

 

[93Stang23]

Usually when I have the A/C on or the defrost on, my car will idle at 500 rpm's or so, but without either of those things on it idles at 1000 like usual.

 

[Lsredy2kstang]

It is reading teh Air Temp and compensating for that. It is normal for that to happen. Nothing really to worry about.

 

[77sleeper]

you could clean the IAC that might help

 

[Tru_Blue_104]

If it does it when youre turning you may want to check the power steering fluid. It may be one of those "stupid" problems.

 

[mustangmat99]

well see, it just started happening, i'v had the car about a year now, and its only been dropping like that for about 2 months...it doesnt happen when i turn, just when i turn the wheel when im at a stop..i will check the power steering, i mean if it drops when i turn the wheel thats steering related..but when im just at a stand still and the rpms just drop whats that? i read up on it and people did say the iac, ill have to check that out as well, but it drops REALLY bad, i doubt my car being one step away from dying on itself is normal, but ill check those things out, any more insight will be appreciated, thanx guys

 

[mustangmat99]

well i went to look at my iac, and my haynes manual said the 3.8 arnt adjustable, you need a scanner to tune it, but u can still clean it, well the diagram it showed ( im kinda engine retarded) so wasnt what was under my hood...so where abouts is the iac? do i need to take the throttle body off? help please