PCV is ticking

My PCV is ticking away and valve cover acting as a resonance chamber. So I get a new PCV, same thing. So here's the thing. The PCV is opening and closing at idle like a fast heart beat. Should it not be either open or just closed? The vacuum coming off the carb spacer is real strong and feels constant. I am thinking the standard PCV I am using for my application, sb 400 is too heavy and the vaccum is not enought to pick up the steel ball in the pvc to keep it open at idle. If so, how do I find correct one?

Thanks  

i bet that if you hook up a vacuum gauge close to the intake.. that you will find your vacuum gauge doing this...\|/  bouncing  ...

depending on how much indicates what the problem might be..   almost every chiltons manual has the vacuum trouble shooting  charts... that show the different problems..

misfiring spark plugs..   crossfiring spark plug wires..  sticking valves... ( in the guides)   excess carbon on the valve face..

rocker arm falling off the stud..  i have found them that have worn through the side of the stud and they fall over..

cam going flat..

the vacuum reading should really be steady...    

fuel pump vacuum testers are available at most parts stores under 20 bucks...  they go from 15 pounds of pressure  to 30 inches of vacuum..  

On top of the PCV tapping at idle and faster as rpms increased. I had started to burn oil, blow blue on start up and high rmps. Now it is fighting to idle, kept stumbling. If I revved it up it would backfire.. Sounds like I smoked intake valve.. Guide went bad, wobbled the valve and ate the seal.

My builder has concurred on this diagnosis of the valve being shot, pulling heads will confirm.  

how old is the motor and the valve job did you do anything out of the ordinary that you think may have caused this  

The build:
40 over 400-509 block -decked and drilled for steam holes
Scat 9000 crank
Scat forged 4130 5.700" Rods, ARP 8740 Bolts
Mahle pistons 10:44 compression
Competition Valve Train
Crane gold full roller rockers
Competition Cam 284xe.
AFR 210 Heads
Hogged out RPM Air Gap Manifold
Pro Series 950 Carb
BeCool Alumium Rad
Headman Headers
2800 TCI Stall Converter
Built 700R4
3:73 Eaton Posi

3000 miles on motor.
I recently adjusted the lash on the valves on the passneger side as it was ticking. A remote possibility I adjusted a valve's lash  when it was not at total top dead center. Which could smack it big time with the piston as it comes up and the valve's timing is off from the adjustment and will bend the valve in the head buggering up its seat, valve and guide.  

that sounds like a really nice motor hope its just the valve and nothing else too serious good luck let us know what happens  

well, found this issue. The # 6 intake push rod came out of the cup. Put it back in, adjusted lash on # 6 intake rocker/valve. All good. whew!!  

Well that's good that it was nothing major.  
Professional hi-performance engine builder

Horsepower sells Engines and torque wins races.

nice motor what kind of car is that baby in? any time slips?  

thats good to hear man  

69nova355.1:
nice motor what kind of car is that baby in? any time slips?

1970 Nova
No time slips on it yet, but hopoing for high to mid 11's