idle air control valve needs work. either clean it inside and out or replace it. could also be the maf sensor
The PCV (Positive Crankcase Ventilation) valve on a 1981 Nissan 280ZX is typically located on the valve cover. It is usually positioned near the rear of the engine, connected to a hose that leads to the intake manifold. To access it, you may need to remove any components that obstruct your view or reach. Always refer to a service manual for detailed diagrams and instructions specific to your vehicle.
rear right hand side of engine next to turbo
The EGR valve is located on the passenger side of the engine on a 2006 Silverado 2500 HD 6.6 turbo diesel. A bad valve will cause the check engine light to come on.
Depends on which diesel you are talking about. A 1993 or earlier the glow plugs located outside edge of the heads below the valve cover. 1994 through early 2003, the 7.3 turbo diesel engines the glow plugs are located in the heads but under the valve cover. You will need to remove the valve cover to retrieve the glow plugs. Basically the non turbo diesels have the glow plugs outside edge of the heads. In all turbo diesels you have to remove the valve covers to get to the glow plugs.
Valve clearance
driver side valve cover between coolant jug and turbo.
the modulator valve does not have a screw, however, the modulator located outside the modulator valve may or may not have one.
Not exactly sure about a 99 but almost all cars it is a valve that goes right into to your valve cover around where you fill your oil.
What is the valve clearance for a Nissan PF6 turbo diesel engine?
Ther is no egr valve on the 2.2 turbo engines. With FI and turbo, there was no need. Some of the earlier carb engines did have egr.
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