[subru92svx]

My car is acting a little weird on cold and warm start ups. When I start my car after its been sitting overnight it starts right up and rpms go up to about to about 1500 like usual until car warms up, but while its warming up I can here the motor reving up and down spiratically until its warm. Then it just idles normally. I don't remember it doing this in the past. Then sometimes on warm start ups I'll start the car and the rpms shoot right up to about 2500 then drop way low to about 100-200 and the car almost dies, but never actually does. I thought it might be the cts so I replaced it with no change in motor. Now I'm thinking it might be my MAF sensor. I have 140,000 miles on my car with the original MAF sensor. I know a lot of people have replaced theirs on higher mileage cars thats why I was kind of thinking that might be it. I already cleaned it with the recommended MAF cleaner and it didn't seem to help. Any help,suggestions, or ideas would be great. Thanks