i was checking to see if anyone had any information that would help me with this 1380 dtc. its a misfire it seems to be worst when engine is cold but seems to go away almost completly once engine is nice and hot. iam just starting to work on my car instead of bring it to mech. so any help would be great.

97 se with 99 l67 engine swap, tranny swap, headers, ic, hi speed fans, smaller pulley, msd coil, prj pro wires, ls1 tb package, 9" cone filter, hi flow fuel reg, and i think thas about it maybe a few small things i forgot.

thanks alot