What does thermal vacuum switch do?
A thermal vacuum switch only allows vacuum to pass through the switch when the correct temperature has been reached. A valve inside opens, and the vacuum, or negative pressure, is able to move through.
What is ported vacuum switch?
Ported Vacuum Switches (PVS) are heat sensitive devices that turn vacuum pressure on or off to vacuum related components such as EGR valves or distributor advance mechanisms. Can be found on intake manifold, water outlets or engine block.
What is a distributor vacuum control valve?
Distributor Vacuum Control Valve. Valve Port Detail. The valve controls vacuum applied to the distributor vacuum advance to increase engine speed by a minimum of 100 RPM when the coolant temperature reaches the high end of its normal operating range.
What is EFE TV?
EFE TVS Meaning. 3. EFE TVS. EFE Thermal Vacuum Switch. Automotive, Mechanical, Automotive Systems.
What is vacuum solenoid switch?
Vacuum solenoid valves are used to control actuators, in most cases connected with the emission system. In general, the diagnosis of modern cars is difficult due to the large number of elements and the fact that usually they gradually change their characteristics but remain operational.
How does a vacuum switch valve work?
The vacuum switching valve (VSV) which controls the vacuum supply to the actuator is normally closed and passes vacuum to the actuator when it is energized by the ECU. By energizing the VSV vacuum is passed to the actuator, closing the air control valve. This effectively lengthens the intake manifold run.
What does a vacuum control solenoid do?
Vacuum solenoid valves, also known as Electro-pneumatic pressure converters, Electric switch over valves or Boost control solenoids are used to control many systems of engines by controlling actuators – for example, variable geometry of the turbocharger, EGR valves, various bypass or throttle valves etc.
What happens when EGR solenoid goes bad?
If the EGR solenoid fails it can disable the EGR system from recirculating exhaust gases. For certain engines this can cause a large increase in cylinder and exhaust gas temperatures. Excessively high cylinder temperatures can cause engine ping and knock, which can lead to serious engine damage if left unattended.