CCM'd Karni Pump not shooting

Ken448 · 11-23-2011, 04:40 PM

OK, borrowed this gun off a friend. Will only "pop" when shot indicating not enough air. He insists it shot previously.
What I have done:
Changed ASA's
Changed Reg's
Tried another one of my tanks (both HP output)
IVG all the way in, and out
Adjusted both regs through their range (both CP)
Valve seems to open pretty easily when de-gassed but it just doesnt seem that the hammer is hitting the valve hard enough.
Aside from re-springing it.. Any ideas? Am I missing something?

russc · 11-23-2011, 05:05 PM

Bolt upside down? :|

Ken448 · 11-23-2011, 05:09 PM

negative. First thing I checked

SeuDog · 11-23-2011, 06:56 PM

Might try and see if the rear grip frame screw is protruding too far into the lower tube preventing the main spring from moving the hammer to hit the valve stem. Take off the IVG, remove the current spring, and see if it is. Good luck.

Ken448 · 11-23-2011, 07:27 PM

not it either.. BUT I did just go through it again.. Its shooting now, but not to velocity. At least its sending a ball out the barrel!

Christacular · 11-23-2011, 07:36 PM

do you have a reg tester to check what your reg's output pressure is? and are you using a super underbore? i know that sounds weird, but my barrel caused the velocity to drop drastically one time. shooting .693 swelled paint out of a .678 does not go over well....

SeuDog · 11-23-2011, 08:28 PM

In addition to what has already been tried, do you have a valve tool?

What kind of valve do you have? CCM?

See if the valve jam nut is loose and has turned out. Big difference in how much the valve stays open.

colorado719 · 11-23-2011, 11:10 PM

Change the battery lmao oh wait wrong gun

11-23-2011, 04:40 PM	#1 (permalink)
Ken448 Active Member Join Date: Feb 2011 Location: SE Michigan	CCM'd Karni Pump not shooting OK, borrowed this gun off a friend. Will only "pop" when shot indicating not enough air. He insists it shot previously. What I have done: Changed ASA's Changed Reg's Tried another one of my tanks (both HP output) IVG all the way in, and out Adjusted both regs through their range (both CP) Valve seems to open pretty easily when de-gassed but it just doesnt seem that the hammer is hitting the valve hard enough. Aside from re-springing it.. Any ideas? Am I missing something? __________________ Ken SE Michigan Need Shocker Parts?? I can repair broken power switches, trigger switches and screw damage to Shocker upper boards! PM Me for info My Feedback

11-23-2011, 05:09 PM	#3 (permalink)
Ken448 Active Member Join Date: Feb 2011 Location: SE Michigan	negative. First thing I checked __________________ Ken SE Michigan Need Shocker Parts?? I can repair broken power switches, trigger switches and screw damage to Shocker upper boards! PM Me for info My Feedback

11-23-2011, 07:27 PM	#5 (permalink)
Ken448 Active Member Join Date: Feb 2011 Location: SE Michigan	not it either.. BUT I did just go through it again.. Its shooting now, but not to velocity. At least its sending a ball out the barrel! __________________ Ken SE Michigan Need Shocker Parts?? I can repair broken power switches, trigger switches and screw damage to Shocker upper boards! PM Me for info My Feedback

11-23-2011, 07:36 PM	#6 (permalink)
Christacular Seasoned Member Join Date: Sep 2010 Location: Los Angeles, CA	do you have a reg tester to check what your reg's output pressure is? and are you using a super underbore? i know that sounds weird, but my barrel caused the velocity to drop drastically one time. shooting .693 swelled paint out of a .678 does not go over well.... __________________ MCB Feedback>>> http://www.mcarterbrown.com/forums/f...ml#post1671907 TechPB Feedback>>> http://www.techpb.com/forum/index.ph...&#entry1399383

11-23-2011, 11:10 PM	#8 (permalink)
colorado719 That Colorado Pump Guy Join Date: May 2009 Location: Georgia but my hearts in COLORADO	Change the battery lmao oh wait wrong gun __________________ AR 15 GEAR F/S/T Slidefire Stock and 6 USGI Mags!! Feedback

11-23-2011, 06:56 PM	#4 (permalink)
SeuDog Active Member Join Date: Mar 2009 Location: Honolulu, Hawaii	Might try and see if the rear grip frame screw is protruding too far into the lower tube preventing the main spring from moving the hammer to hit the valve stem. Take off the IVG, remove the current spring, and see if it is. Good luck.

11-23-2011, 08:28 PM	#7 (permalink)
SeuDog Active Member Join Date: Mar 2009 Location: Honolulu, Hawaii	In addition to what has already been tried, do you have a valve tool? What kind of valve do you have? CCM? See if the valve jam nut is loose and has turned out. Big difference in how much the valve stays open.

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