under the intake port tubes
Need to know which one you are looking for or, what does this vacuum control valve control.
The power booster check valve would be located where the vacuum hose is connected to the booster. The vacuum hose is connected to the valve and the valve is inserted into the booster. They are usually made of plastic.
The bleeder valve for fuel injection for 1986 Nissan 300ZX is located at the furthest end of the fuel rail.
it should be right off your intake manifold.
The PCV valve is located on the top of the valve cover. There will be a large vacuum line connected to it.
At the outlet to the fuel injection hose.
Vacuum check valves are usually located close to the vacuum source.
the pcv is located under the fuel injection plenum, towards the back of the engine as opposed to some newer models that have this valve located in the front of the engine on the valve cover
the secondary air injection system is the smog pump and valve. the valve is located on the exhaust manifold with 2 hoses leading to the smog pump which is located under the drivers side floor. it is electric.
It is located in the valve cover. There will be a large vacuum hose that goes to it. Always purchase a quality valve as it is very important for crankcase ventilation.
The Vacuum switching valve controls the EGR Valve.
There is no vacuum at the nipple on the EGR VALVE. The Vacuum line that hooks to it should suck your finger when you speed the engine up. That line will come from the TBI ( Throttle Body Injection housing) and hook to the EGR valve, and when the engine RPMs. go up it sucks the EGR VALVE OPEN. UNDERSTAND.