i might sound stupid but i put an intake on my focus earlier today and got everything hooked up right...

or so i thought...

i forgot the maf sensor...

so my car started to run funny.. i put the stock intake back in including the maf. and now my car is running really rough and will die at a light unless i keep my foot on the gas... and when im driving i can only get up to about 2k everytime before having to shift ...

anyone know what could fix this?