IF i plug the hole in the intake and put a oil breather in place on the valve cover, what will happen?...I already deleted the EGR and AIR from them PCM..so what about this?.... good or bad?..thanks tony

 

its fine
not better
not really worse
just fine
do it for appearance if you want and have $20 blow (or your PCV valve is ripped)


ps your plugging the TB

 

Better to leave it like it is. Putting a breather in it opens the system and creates a small vacuum leak. The pcm can compensate for this, but there is no real reason to do it unless you have a blower and excessive crankcase pressures. Just so you know, the pcv is not in the valve cover.

 

ok that was dumb....so then what's that hose that goes from the valve cover to somewhere else(i thought it was the intake, guess i'll have to take another look)?...thanks Tony

 

That's the crank case blow off.. you can put an aftermarket filter on there for a breather without any problems... just plug the hole where the hose goes into the Throttle body.

 

A little background on the PCV system.....

Clean, filtered, METERED (94+ only) air is pulled in through a port right in front of the throttle blades, it travels down the hose to the passenger side valve cover. From there, the vacuum from the PCV valve (located on the drivers side of the intake manifold) pulls the clean air through the crankcase and lifter valley, out through a sheet metal cover on the bottom of the intake manifold, out through the PCV valve, and back into the upper part of the intake (93/94) or to the front of the intake (95+).

It is a closed system, and the air that flows through it is "metered" air... it has goen through the MAF sensor, and is included in the fuel calculations. The system works fine, as long as your car isn't S/C'd. It effectively removes harmful contaminants and vapors from the crankcase. Removing the system reduces the effectiveness of crankcase venting, and allow moisture and harmful contaminants to build up in the crankcase. "Pollution" is only 1/2 of the purpose of the PCV system.... POSITIVE ventilation of the crankcase to remove contaminants is the other 1/2.

If you defeat the system, there is a minor error in the fuel calculation.... similar to a vacuum link. And nothing the PCM can't compensate for.

But I can't see any advantage at all in defeating the system. I run it on an 800HP nitroused stroker, and it does its job. The people who don't like it are the ones who find oil in the top of the throttle body, and dribbling into the blades. In that case, you either have a plugged PCV valve, or excessive blowby on the pistons. Fix the problem, not the symptom in that case. Adding a breather will just blow the oil out of the breather at that point.

 

wow...thanks for the info, i'll leave it as it is..thanks Tony