??Threaded PCV Valve??? What the F---!

I have a 2000 4 cly. and i want to replace my PCV valve because i think I have a vacuum problem and I hear a hissing, but my valve is threaded into the valve cover and I can't find any reference anywhere to threaded PCV's on tacomas. Also, I wanted to test the vacuum on the line, so I pulled the hose off the PCV while the engine was running and it stalled. It shouldn't stall, should it? That's how you're supposed to test it right? Someone help!

If you remove a hose from a PCV when the engine is running it will ususlly stall the engine. You need to remove the PVC from the engine with hose attached and test for a vacuum through the PCV. My truck is a 2004 and PCV is not mentioned in the maintenance guide, I see nothing on the valve cover that resembles a PVC. Some vehicles don't use a PVC but have an orfice that restricts vacuum flow through the crankcase ventilation system.
Clifton

so are you saying that i may not have a replaceable PCV valve? In the Hanes manual for my model year, there is a photo that points to the pcv exactly where this threaded orifice is located on my truck. i also bought a PCV for my truck at Advance before i looked at mine, so they do exist. I'm confused. and wondering if this may be a modification done by the previous owner, in which case, it sucks. anyone else encounter this problem?

OK, I looked at my truck again and on the rear of the valve cover I see what does look to be a PCV valve, it is screwed in and is not a previous owner modification, I bought the truck new. I looked through my Toyota maintenance log listing the checks the dealer is supposed perform when a vehicle is taken in for service and I still cannot find any reference to servicing or replacing a PCV. I have bought lots of parts from Advance and thier information and replacement parts are not always correct. As I said in my first post, pulling the hose from the PCV will probably stall the engine as the PCV has a restriction built in it and pulling the hose from the PCV causes a big inlet vacuum leak. At least with a screw in PCV you don't have to worry about a gommet which usually hardens with age and will need replacing when the PCV is replaced. My truck is a 2004 and Haynes stops at 2000, I expect to buy a shop manual later.
Clifton