On my 1978 Camaro one vacuum line goes to the EGR valve and the other goes to the carbuerator.
under the intake port tubes
Should be on top or side of valve covers round disc like thing usually silver & has rubber vacuum hose going to it
It's for a modulator valve. The later cars all shift by electronics and signals from the ECM. Yours however still uses a modulator valve and vacuum to assist in determining shift points.
The Vacuum switching valve controls the EGR Valve.
Check the vacuum lines that run down to the front wheel hub bearings if they are good follow the vacuum lines up to the 4x4 vacuum solenoidon the firewall and check for a stuck vacuum valve
EGR valves are usually activated by a vacuum line from a thermal sensor. It could be leaks in the vacuum lines, a failure of the sensor, or a failure of the valve itself. Since the valve is exposed to the heat of the exhaust system, it is prone to jamming from carbon buildup and destruction of the vacuum diaphragm from heat.
on a '95 camaro the EGR valve should be next to the radiator hose
If your EGR valve is vacuum operated, simply remove the vacuum hose from the valve.
The pcv valve on a 1989 Camaro is located in the top of the valve cover. It plugs into a rubber grommet and is easily replaceable.
the brake vacuum booster connects to the intake manifold all by itself and the PCV valve hose should hook directly to your carburetor.
on some cars there is a automatic transmission modulator valve that tell by vacuum when to shift gears. If that valve goes bad you will get tranny fluid in your lines.
just get rid of all the lines except for you pcv valve, brake booster, vacuum advance and plug the rest of the lines off
evap vacuum cut valve bypass valve
in the valve cover
Defective modulator valve.
how does the 83 tercel thermostatic vacuum switching valve work
Remove the EGR valve vacuum lines. Remove the EGR valve retaining screws. Wash the EGR valve in hot water. Allow the valve to thoroughly dry before installing it.
On a 1996 Chevy Camaro, the PCV valve is located on the right side of the valve cover. There is a hose that runs from the PCV valve and connects to the back of the intake manifold.
passenger side, black tube going into a vacuum port on intake manifold, right after throttle body
May be: Vacuum release Valve
If it has vacuum lines attached to it, it is probably a thermoswitch that controls the vacuum to the egr valve. If it has an electrical connection it is probably a engine coolant temp sensor.
There is a heater control valve on the 1999 Ford Ranger. There is no thermal vacuum valve on this year of the vehicle.
P0401 "egr insufficient flow" can indicate many things, including: 1-vacuum line plugged or leaking 2-pipe from exhaust to egr valve plugged 3-pipe to vacuum modulator valve from egr valve plugged 4-passages at egr are plugged 5-bad egr valve 6-bad EGR VACUUM MODULATOR VALVE I tried cleaning egr modulator valve, (beside/above egr)removed and tested egr vacuum & movement, inspected and cleaned all vacuum lines openings and pipes. All above did not work. I replaced the egr vacuum modulator valve. Light went out without a reset in about 30 miles of driving. Not sure if this valve can be cleaned. Retails for $69.US