I have an issue I just cannot seem to put my finger on. For the past month I have noticed my gas mileage becoming horrible. I used to get about 350 miles to a 14 gallon tank. Now I am only getting 260. I also noticed the car running extremely sluggish, no power at all. Everytime I would cold start it, it would only run at 800-900 rpm. A week an a half ago I had a CEL come on code reading P0102. The dude at AutoZone suggested I try cleaning the MAF before replacing it. Did that, it didn't work. Got the P0102 code again. Ordered a new MAF. Put it on. CEL gone. Cold start idle is up and my gas mileage is back to where it should be. So that was part of the problem. Now the car shakes horribly SOMETIMES when changing gears, and whenever I punch the gas hard I get a new CEL code...P0103..the complete opposite of the P0102. But as soon as I clear the code the car runs perfect just as long as I take it easy. The CEL only comes on when the .car starts to accelarate quickly. Any ideas as to what this could be? Thank you for your help.