1979 20r vacuum diagram | IH8MUD Forum Dec 05, 2013In the little book called Toyota 20R Engine Emission Control Repair Manual for USA and Canada, 1979 Model, there is a good pictorial diagram of all the vacuum lines, as well as a schematic diagram. Very useful, and just what you are looking for, I think. I suggest you look for this, and other, repair manuals on line and in this forum. Toyota 22R and 22R-E engine factory workshop and repair About the 22R engine The Toyota R family was a variety of straight-4 gasoline engines. Created for longitudinal use in such cars as the Celica and Hilux and in manufacturing from 1953 through 1995, use faded out as numerous of Toyota's mainstream models relocated to front-wheel drive.