I had this different IAC installed so as to raise the rpm when a/c is kicking. Problem is that the engine still feels like heavy when the a/c is running. No matter what tuning I did (BISS, turning the distributor), the result is still the same. My A/C is not overcharged by the way. What should I do? Get a new Throttle Body with the IAC? I'm on a tight budget so that would be the last option. Please advise. Thank you in advance