It's not throwing anying codes that's what is strange.But the guy i got it from had the o2 senors unplug i plug it in did notice anying diffrents but it plug in.Blackdog how many o2 senors do u have on ur 3.0 v6? I have just the one in front of the cat.I notice also that the cold intake tube that goes to the K & N filter has gas in it not alot just a few drops and it smell rich.Is the mass air sensors the sensors that's by the air filter?