well i had done a head swap of a z6 into what was it i think i was a d15z1, i had a problem the friend told me.. that it was lagging.. i told him it might be a few things.. (lags on high end), it might be a blown valve.. so then i took the head out and nope.. not that problem.. other than that.. i replaced the head with a z6 head.. got to work but now dude says, "- when it idles, its ok, but when i go, it chokes and chokes then it dies... only if you tap it to rev high it would work go without dieing.." what do you guys think??.. i think it might be fuel problem, it might be the intake manifold.. im unsure now... what could that problem be caused of??.... questions??.. im up for it.. ask away and help if you can.. thanks..

 

bump i have the same problem! help