STILL GOT BOLT STICK: Gas up your marker, then degas it. If you see your bolt half way in the chamber then that means you have way to much lube or grunge inside. In that case take cooking oil and scrub the inside, not hard but enough to get it out, dry the inside up and small amount of lube for the inside and bolt, dry fire to get out any left over oil in the passage ways. Then just take a micro fiber clothe and wipe out the inside, and bolt. Then Completely lube up marker and dry fire a couple times and that should do it.
If this didn't help Buy a L7 Techt Bolt engine. I got this because of efficiency.
+Sounds like the new Solenoid is running hot from dwell being set a little high.
"It would Shoot a very hot ball (310+fps) then the fps would DRASTICALLY drop to 130fps"