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There should be a small diagram on a sticker under the hood or in the engine compartment that shows the route of all emission related vacuum lines.
Most Auto Parts Stores sell them.
The Toyota 1978 20R Emission Control Repair Manual, pub 98268 is still available from Toyota parts, is about $12 and covers all versions of 1978 20R engine emission controls and vacuum lines. You have to have your dealer order it by part number.
Public Library/ They will have computer access to Chilton manuals. Get a library card. You can print the diagram for .25
Vacuum lines supply vacuum for various functions.
The vacuum lines, in a 1993 Honda accord, are controlled by a vacuum pump. The vacuum pump regulates the proper pressure in the vacuum lines.
Many catalogues of emission spectroscopy lines are published. These lines are not visible on all types of instruments.
Vehicles made in the USA have a diagram on a sticker located under the hood in the engine compartment. The sticker shows the routing of the emission related vacuum lines. Vacuum lines ae connected to the inlet manifold at one end, to work on the depression at this point. There are several ancilliaries that may work off this, the most popular being the brake servo. Also sensors for the ignition (advance and retard), vacuum servos for 4x4 control, computer management box and emmision controls.
where do the vacuum lines go on the 91 4runner
bad wiring or bad vacuum lines at he FTPS (fuel tank pressure sensor)..location fuel tank itself.live. wrench. learn.
You usually need a constant source from the intake manifold to the power brake booster, and a spark-ported source from the carb to the distributor. There could be other emission-related lines as well, depending on the year.
Drawing Black Lines was created on 2000-03-21.