i dunno whats going on, but when i press the gas slighty and let go.. i hear a sound like ball bearings spinning...
i'm running 93 octance, and stock timing onmy greddy turbo kit for sohc civics.

also my lag is really long... i reach full boost past 3500 rpms... could it be a leak?
thanks

 

Sound like marbles dropping on your valve cover?

 

well kinda, its not that loud , i guess that would be pinging? but why is it happening only when i let off the gas?

 

No, usually det will happen under boost. When you let off, it will normally stop right away. Whats your set-up?

 

greddy turbo kit (15g turbo)
old supra intercooler,
greddy type s bov
93 octane gas
brand new 5w-30 mobil 1 synthetic
new oil filter
stock timing