Please Help

I have a problem with my 92 Eclipse. when i start it up it smokes pertty bad out of the tail pipe.. i though it was the oil.. so i got it drained and put some new oil in, but it still smokes.. so then i disconnected the battery for about 20 seconds so i could reset the ECU and it doesn't smoke as bad when it idles but when i rev it, it's pretty bad... but it's only when i first start it up and it is sitting still. is it my valve seals.. or maybe my plugs are fouled up and need to be changed i haven't though of that before till know. So, can anybody pls tell me wat my problem is? i hope it isn't my valves, i don't have the money.. :( and i jus bought this car too.

What color is the smoke?? If it is white, you have a water leak, so probably the head gasket. If it is blue or black, that would be oil, and that could be anywhere. A light smoke that smells like gas would be you running rich. A burning smell would be running lean. Tell me what it looks like and what it smells like and I will let you know.

When it idles it's a light smoke, kinda smells funny... but when i rev it, it gets white, it's not as bad after i like drive for a lil while.