Thread: Gen v pcv

I have the nipple for the fresh air intake on the pcv capped and now have the breather in the oil cap. I ran about a month with it capped (done at time of swap) but no breather with no issues. I have the breather now so how important is that nipple?. I have no egr.

Originally Posted by Maximum Gnarnage

In stock configuration, that nipples serves the purpose of supplying fresh air from the intake to the PCV system. It connects to the intake between your maf sensor and throttle body. Are you intercooled or is your stock pcv sytem blocked somehow?

its a gen v swap on a gen III in a fiero so I'm not sure if the pcv is working or not. I'm not intercooled but possible in the future.

I had a issue that developed over time with my pcv system blocked and no valve cover breather where at idle the engine made a screech like a belt slipping as it sucked in through the front valve cover gasket (which was new). After I fixed the problem had to change the front valve cover gasket again as it was heavily leaking oil.

I di have the breather but was wondering if I should find some way of making the pcv system work or just leave it the way I have it.

Drill and tap a hole in your tb after the throttle plate, but before the maf.Screw in a nipple,and run a vacuum hose between it and the pcv nipple on the sc.

Originally Posted by Maximum Gnarnage

tweeder- what throttle body are you using?
sounds like your stock pcv system should work fine and is definently better than a breather. basically, you need to uncap that nipple and route a hose from there to somewhere in your intake between maf and throttle body. your throttle body may have a nipple that serves this purpose in which case you could just attach it to that nipple.

I'm using the stock throttlebody with the gen III to gen v adapter plate.

http://www.grandprixforums.net/threa...cover-breather! heres the how to. with pics.

Don't run a breather. Make your PCV functional and do it the right way.

Bad thing about the breather, it lets in unmetered air into the crankcase, scewing your LTFT's. Also, when I didn't have a functional PCV, everytime I took off the Gen V, there was oil/mildue sh*t all on the corner of the LIM, by the PCV inlet.

Making your PCV functional is very simple.

Tools needed:
-Drill/Drill Bits
-Tap & Die set
-1/4 Nipple. (Got mine from Napa)

Procedure:
-Drill brass plug on the bottom of the stock Throttle Body
-Tap with a 1/8 NPT
-Screw in 1/4 Nipple
-Run vacuum line from Nipple to PCV on Gen V

No Bueno:




Bueno:

Thanks for that Dan and Scott.