Need some help here guys, bought a 99 cobra. The guy before me took off the procharger and then sold it to me. It has been having some air problems and running really rough not wanting to start, and dies easily. I tried changing the maf sensor and iac valve and it didn't help. Took air filter off and ran much better. IM thinking it might have something to do with being tuned for the procharger but im at a loss for now, anyone help me out?