coolant

[sunbird 92 3.1]

My sunbird has been acting up when I go to slow down or stop the engine would Rev a Lil high then go low it would keep doing that until I started going again so I started checking fluids and my radiator fluid was brown immediately I thought blown head gasket but its not oil it looks like mud n it waseny like this about 5 days ago when I checked all my fluids does anybody no what it could b or how I could flush out the whole system I already emptied the overflow n I don't no what to do next please somebody help me I don't want to loose my sunbird it's a 91 3.1

 

[melsg5]

take the car to a quick change oil place and have them flush the cooling system. The irregular idle is not related to the brown fluid unless you have a blown gasket. How many miles since you last replaced fuel filter, air filter, spark plugs, etc. Is you check engine light on?

 

[sunbird 92 3.1]

My check engine light was on but I flushed out the whole thing today n put new fluid in the radiator the engine light don't come on anymore image change wires n spark plugs tomorro