I have an 05 MR and I put in a Forged bov and removed the pill in the vacum line. That made for a really bad studder when I let off the throttle. I have now replaced the pill and put the stock bov back. The battery has been disconnected for a period of time and the problem is still there. It is now much much better than before but no where near back to stock smoothness. I do have the Vishnu turbo back and the perrin o2 sim. There is currently noCEL. Would those two items on there own cause the studder? Also as far as the BOV install goes I have seen talk here about installing them backwards intentionally. Does that work for some aftermarket BOV's? I can not understand why it would. Thanks guys!!!

 

Anyone?????????????