So for some odd reason i seem to have a soft spot for the 6.5. I just bought another 95 1500 Z71 with the diesel. Now what i am trying to figure out is if a previous owner has installed a chip...It blows coal like crazy. As of now the vaccume pump is not working and the boost guage reads only about 3psi max so i know that is to blame for some of the smoke....but i still have a hunch that there is a cheapo chip in there somewhere....whats the easiest way to check??