help me pls guys, super back firing

[GreenPony95]

OK so after 12 hours of rain n work, 3 buddies and i got my exhaust installed finally, its all mac brand, long tubes o/r h and the after kat,
got the o2 sensor extendors, running an auto and cai, i have no egr or smog pump. well its getting mad backfire, i mean i cant drive a length without it sounding like i am doing a drive by, anybody know why its doing this? i cant even really drive it, its insally loud, like straight outta compton loud, when its not bckfiring it sounds soooo good, i just need to know why it might be doing this b4 i take it to shop, any help would be great, thanks guys
kyle

 

[scarface]

is it backfiring under acceleration or deceleration?

 

[GreenPony95]

both, at idle at high speed no throttle or throttle

 

[Steven]

Well that would be it probably running lean.. if you have an adjustable fuel pressure regulator, bump it

 

[GreenPony95]

ya im stupid woooo! holy fuck, wired plugs 3 and 4 back wards ya fun.
fixed now. god i feel dumb

 

[Twista]

ya im stupid woooo! holy f**k, wired plugs 3 and 4 back wards ya fun.
fixed now. god i feel dumb

i would too.

lol j/k, Glad you fixed your problem O0

 

[scarface]