blue wire is the color of the tach wire...but thats on the dizzy and engine harness, what does the blue wire go to ?thank you all for your info. i did put it in to netural and pressed on the gas, and it seemd like it was only getting like 1/4 of it....i figured out what it was....there is a blue wire that runs to the positive side of the battery...ya that came unhooked but i hooked it back up and it started up just fine...as for the throttle sensor....i have called every auto parts shop in my area and they all say they dont have it in stock, and are not able to ship it....any sugjestions???