Civic EG

ermm dono how to describe the problem... ok,when the car starting to go,when the clutch is release from ur foot,the rpm will drop from 3,000 to 300,n make the car slower,only in starting.after the starting,the car go smooth D15B manual,who ever facing this problem before ?

sounds like it is bogging down... are you giving it enough gas pedal to get the car moving from a stop?
You recently converted to manual transmission correct? Starting in 1st gear can take some time/practice to get used to...

i even try to release the clutch when the RPM is on 6,000 n when the car is going,the RPM drop direct to 300 like that
dont worry,i driving my company car in manual transmission everyday,im pro with it
yes,everyone will say i not get use of it,mechanic even say manual is like that when u release ur clutch n the rpm will drop,but in my case,i dont think it is normal
hope to get some info to fix it if u catch what im saying,thanks~

is it an oem style clutch or something aggressive like a 6 puck or unsprung?

[is it an oem style clutch or something aggressive like a 6 puck or unsprung?] im not really catch what u mean~do u mean something problem with my clutch ? i nv change the clutch before coz im bought the gearbox from halfcut togather with used clutch coz since it still look nice n i just swap it up directly~

I was asking because if it is a 6 puck clutch, it will bog down like you described easier than an oem clutch.

also,
Do you have a check engine light?

no,it is an oem clutch n i dont have any CEL after fix it that day

some others say is timing,but i have replace my new TB n try to do adjustment on distributor but seems no work,my timing now is around 800-900,correct rite ?