Not weird at all. You can TUNE out the surging idle but that is not the correct way to solve the problem IMHO.
At the time I had a closed system with a pcv. but I kept blowing the PCV out so I then made an open breather set up Never changed my tune car ran the same...I put a breather on where the PCV goes a breather on my Pass valve cover had it this way for 3 yrs...NO issues except oil in the engine bay...that's why im going to install a catch can system once I get a set of Nicks Valve covers...LOL so I can complete my job....
You could easily open up an additional vac source into the pass side valve cover. You'd split PCV lines into these two vac sources. The problem has always been that the PCV port on Windsors is way too small.
Create another PCV and have them share the load. This maintains a closed system and you still get all the air volume needed by a boosted app.
edit:
...and no oil under the hood.
Just wanted to make an additional point to this part specifically. The factory EEC has a modest amount of ability to compensate for a lot of things. Changes in fuel curve vs. air meter readings, is one of those things.
Keep in mind though, that if you've changed your metered air characteristics and the EEC has adjusted itself to compensate, you have official utilized a good percentage of its ability to adjust.
This in itself leads us to threads like (and these are some of my favorites):
All I did was A, now B is happening. When I undid B, I got C. WTF???
This is why I try and push all of those checklists that @jrichker puts out. A problem can be the culmination of many different things before symptoms can appear.
On that same note, maybe the next small adjustment in metered air is made for some reason. If we've already burned through 90% of the EEC's ability to adjust, what are we left with?
I should be able to get to yours and @MY 85 GT s valve covers in the next week or so. I'm putting my car back together tomorrow and the GTO is out of my garage as well. I'll inbox both of you guys in the next few days
From the Useful Technical Thread Index at the top of the Tech forum:
http://www.stangnet.com/mustang-for...oil-consumption-through-the-pcv-valve.637524/
http://www.stangnet.com/mustang-for...oil-consumption-through-the-pcv-valve.637524/
Let me start with this:
There's really no right or wrong with choosing PCV or vented. What is really the most important is that they don't get mixed. You have either a closed PCV system or the PCV is removed and you're running breathers.... Not both.
The baffles:
The reason that they exist is because of the previously mentioned tiny PCV vac source. That small opening makes all the air going through it twice as fast as it would if there were two (or one twice the size). The object of the second PCV is not to create more "suck"... It's there to increase air volume, and reduce the air velocity by half.
Slower air pics up considerably fewer oil droplets that are suspended in crank case air. Those particulates are allowed to fall instead of being rushed through the PCV opening.
So they baffled it! Easy fix, right?
I don't run the baffle in my valve cover either. I run two PCV lines with a small separator on each. I can't recall the last time I had to empty that thing.
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