So I have been playing around with different PCV valves on my carbed engine. I had a mystery valve that I thought was from my old 302 but it seems to flow way too much air at idle. This is quite noticeable on both the wideband (lean) and if you put your hand over the other grommet on the valve cover it will pull a pretty good vacuum on your palm after a second etc...so it is doing its job vacuuming the crankcase I get it, but seems excessive to me. I realize that vacuum is maximum at idle and cruise but shouldn't the PCV valve should limit this flow accordingly ?
So thinking I had a much bigger than normal PCV valve or something I ordered a replacement for a 79 mustang 302 but same thing it seems to move too much air !!
The other issue is that this seems to suck a bunch of oil into my carb spacer where I have a port for PCV etc. I tried putting an oil mist eliminator in the line and it will build up some oil (probably a tablespoon or so) after only a short 50K trip and that seems way to much.
Never really noticed these kind of things before I got playing with the wideband. I suppose before the oil mist carryover was just burned off but at that rate if normal it wouldn't take long to be down a quart in my opinion. Not to mention its probably not greatest to burn the oil if it can be helped.
So I'm curious what's normal and/or what others have experienced or done etc ?
Thanks in advance.
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