Hey i have a 2.2 and i put on a megan racing cat-back exhaust and injen cold air intake but its in shortram atm( all the snow and rain) and before those mods i was at 30-32mpg and now im showing 20-22mpg think i have a leak in the exhaust? cuz i got the intake like 3weeks later so it was the exhaust that lowered my mpg and i dont really get on it that much.

 

When I got my intake and exhaust, my milage went from 36 to 38 on highway and 24 to 25 in city. I never did reset my computer either.

You might be getting crappy milage from the winter gas, letting your car warm up, or just because it gets bad milage when you start it up.