m1candelaa1

iTrader: (13)

I just put on my Lt headers,open, going for custom dual.There is a poppin sound sort of like a hissing sound when i rev it sounds like its back firing.I chacked all my plugs and wires there all newis this normal?Do i need thicker wires?

LILWS6

thats normal your gana hear every noise your car always made but theres was too many things in the way that you couldn't hear them. Well yea its normals if your running open headers

senicalj4579

iTrader: (41)

i think that has to do with unburned gas making it down the headers? i have the same thing sometimes

nor-texLS1

yup, totally normal

Hennytime

iTrader: (33)

running rich + no cats

m1candelaa1

iTrader: (13)

I had a custom dual exhaust installed today,the popping sounds like backfiring.In 6th gear 70 when i press the gas to speed up all it does is shake and starts poppin.Any idea whats goin on?

3.4camaro

iTrader: (1)

its under load at a low rpm, under the torque band. downshift if you want to accelerate in 6th.

m1candelaa1

iTrader: (13)

any one

m1candelaa1

iTrader: (13)

This started happening with recent header install. BTW 70 mph in 6th should not boggle(only under 60)

bww3588

iTrader: (49)

you got a misfire. check to see that none of your plug wires are resting on your headers. if so change them out with new ones or MSD. your choice. also you may want to install new plugs while your at it.

FU_I_AM_UltraZ

iTrader: (20)

that's the noises your muffler would soften up. on cold start ups with a completely stock M6 car, you can hear that pooping very slightly until the engine reaches about 120 degrees

3.4camaro

iTrader: (1)

slightly?

mine sounds like a chainsaw in between shifts

m1candelaa1

iTrader: (13)

I was also told by my neighbor its a missfire.My plugs have about 6000 miles on them,they are NGK 555s . While i was changing my plugs i ripped my wires so i bought some new ones from autozone,they are real thing i needed them right away couldnt order MSD and wait for them to come in,(its a DD).I never had any problems with them until header install.Could it be there to thin for the headers?

SS1875

iTrader: (34)

May need to retune a bit , my car was still dumping fresh fuel on decel and making it Pop, also check for exhaust leaks.