ok i just installed a h22 in my del sol and i took her for a spin down the street, this car has no exhuast past the down pipe and it runs a little slow the rpms rev slow to i was wondering if any of you could help me figure out why it revs slow is it do to no exhaust. this motor ran great in the prelude i had it in but it had exhaust.

 

Are u getting any cels (check engine light)? is Vtec engaging? More info on the engine and car plz.