Hi, i am new to the site and i just wanted to get some input on some issues i am having with a 99 gtp i just bought yesterday. First off the temp guage will only move off rock bottom when i let it sit there and idle and then it will start to blow heat out, i can tell the blower motor is getting ready to go because its making a lot of noise. But as soon as i start driving the temp guage drops all the down to below the 160 degree line. Also the stock boost "guage" only goes about 3/4 of the way up with my foot on the floor and it seems to be stuttering when im on it all the way. Only mods done are a 3.5 in pully, headers, and down pipe. I appreciate any help anyone can give me with this. Thanks in advance, Dakoda