eclipse gs motor does not maintain idle. when it comes to a stop it cuts off. what might be the problem?

Big vacuum leak or IAC. Idle air control valve.

thanks Mark! You've been very helpful.

EGR needs a GOOD cleaning... Mine did the same, and did the "seafoam cleaning" and that did the trick, but eventually had to replace the EGR valve, they are NATORIOUS for going out, but is is back to getting me around again. GOOD LUCK!