Re: Idle Surge and check engine light???
Seafoam it, change plugs, potentially consider getting a new ISC/IAC (or get it from one of the many partouts going on now).
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94 3000GT Base - Sold 
My Cobalt SS/SC
Dyno: 228whp 204tq (w/CAI, Cat-back, S2 and 3.06" pulley)
AEM CAI || GM S2 Tune || S2 Injectors || 2.9" S/C Pulley (3.35 stock) || Magnaflow Cat-Back Exhaust || NGK Copper Plugs || BWoody Solid Front Transmission Mount || Ingall's Torque Damper || DC Sports Front Strut Tower Bar || 35% Carbon Black Tint || ARK Shorty Antennae
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