Quote:
Originally Posted by metrogdor22
I'm going to say something I never thought I would: My car is too loud. After getting offroad headers and a cam, I need to quiet it down, at least in the mornings. My car is equipped with the factory NPP exhaust, but the previous owner did something to keep them open. The only way I know of to do this is by pulling fuse F8 in the trunk fuse box. I checked today, and that fuse is still there. Did the previous owner do something else to keep it open? Maybe a tune? Can I get it retuned to restore that to factory functionality?
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Don’t know about a tune controlling the NPP but I’m going to guess no. Couple of other thoughts. Is the fuse good? Check out a Dashlogic OBD2 unit. In addition to displaying PID info onto the DIC, HUD or Mylink screen it also controls NPP operation ( stock, always open, always closed) NO wiring required, you just use the cruise control button like a toggle switch.