I have tried to post pics, but do not know if it worked. Anyway, if this makes sense, I have a 2001 P38. Getting code "too rich". Some good advice was to change the plugs. While doing that, noticed a black object coming out of passenger side of air plenum. Looks like a vacuum nipple, to accept vacuum hose, with a red collar around it. If you are at the front grill, to the left of the plenum (passenger side). Any thoughts or pics appreciated.