... vacuum booster and engine, or installed on PCV valve. (Have been equipped with special pads, fuel ... to the engine, but never allowed to exceed non-return valve of the brake vacuum pump suction pipe, Otherwise ... brake booster and engine, or on the PCV valve.2, for EFI car series:(1) Find the ... saver on the negative pressure intake between the PCV valve and the engine. (The negative pressure before the ...