I removed my pcv system and put filters in, It will idle up to like 2k then drop down to normal a few seconds after I stop , anyone got an idea what to tune to get the idle back down. I'm using HP Tuners .

Thanks

 

did you plug every hole that the PCV system used to use?

Also keep in mind that adding a breather is in effect adding unmetered outside air into the cylinders (whichever side you put the breather on, usually passenger)

not sure if it's enough to cause problems (I tuned my car SD, then put a breather in and it was fine, however passenger side fuel trims are different than driver side by alot)

 

I plug all the holes, the hose from the passenger vavle cover to the TB is still there and the filter is in place of the oil filler cap ! My car is still maf tuned ! IM just trying to figure what to look at to fix this idling problem !

 

The symptoms you describe are a vacuum leak somewhere (unmetered air entering the intake manfold past the MAF)

I'm thinking the breather is the issue... you can test by (at idle and don't run like this perm since you don't have a PCV system) putting the oil cap back on... if it then idles normal, put the breather back on... if it messes up again then the breather is the culprit

 

Is the breather on suppose to let air in or out ?