nc z28

i just had tea s1.5 5.3 heads installed w/ a tr 224/224 563/563 112 lsa cam. also had asp crank pulley, ported tbody,and etc. instaled. the car has not been tuned yet but it does need it. (im getting it tuned next week) yesterday when i picked it up it ran fine. but today, when im at 3000 rpm or higher and get on it, it starts jerking. what is it? is it just that i need tuning? if so why didnt it do it yesterday when i picked it up? please help! , im praying nothing serious is wrong.

jmX

Loose plug wire? Loose O2 wire? Does it do it at WOT and part throttle, or just one or the other?

nc z28

seems to be doing it on both. but much worse on wot.

nc z28

now the car wont crank at all. seems like its not getting any fuel.

mike m

iTrader: (6)

check all of the ground wires

98TAauto

iTrader: (2)

when u say it wont crank do you mean it doesnt do anything when you turn the key?? Just clicks??