i donno if i in da right forum but see if u guys can help me out.

my subby is missing on 3 cylinders. now i changed da plugs da same thing i changed da leads still the same thing , now i dont no what else could b cuazing da prob, i aint gettin no current to 3 of da plugs.

and i have just recently rebuilt my engine wid some bigger forge pistons, da car ran for about 2 months then developed this prob..

n e ideas ???

 

Do you know if your harness is kinked anywhere when you reinstalled the engine?

Do you use engine management?