how does the 83 tercel thermostatic vacuum switching valve work
The Vacuum switching valve controls the EGR Valve.
the valve is on lower side of engine near fire wall.
in between the intake manifold, bottom half.
Despite the rather lengthy name the EGR-VSV ( exhaust gas recirculation vacuum switching valve ) does little more than allow vacuum to flow through the system depending on engine coolant temperature. An element within the switch reacts to temperature changes, opening and closing the valve at a predetermined level.
The VSV is located on the left side fender, on the curve of the wheel well. It is the middle valve of a group of three.
The VSV is located on the intake manifold side of the emission control valve set.
VSV is a solenoid. Check at your Chevrolet or Isuesyou dealership.
It is a bimetallic vacuum switching valve. it controls the EGR system.
EGR stands for Exhaust Gas Recirculation. The purpose of the EGR system is to lower the amount of oxides of nitrogen the engine produces. The parts of the system are the vacuum actuated EGR control valve, the vacuum switching valve, and the EGR vacuum modulator assembly.
the vacuum switching valve that run the valve are a common problem they are intermittent stuck closed so do not operate the valve
Its under the EGR on the block ya. follow a hose from egr to vsv from underside of car
under the back of the car beside driver back tire under the spear tire...