92 camaro help

I just bought a 92 camaro rs, with a 3.1L v6, I am having a minor problem with it(atleast i hope) When i sit at a light for 2 min or longer, the rpms drop to about 500 then go back up, but the check engine light comes on......anyone have any ideas?

Several things could cause this, do you know how to do the self diagnostics to pull the codes in your computer?

Several things could cause this, do you know how to do the self diagnostics to pull the codes in your computer?


no, this is all pretty new to me, as far as the whole domestic/chevy thing.....up untill now, all i have really delt with was imports

it almost sounds like a malfuntion with the IAC valve (idle air control) but first see what trouble codes are there.