5.3LGMC

I have a 3 inch strait through glass pack installed right after the y pipe, then extended pipe after the glass pack and dumped it before the axle. On deceleration i experience a popping out of the exhaust....any ideas on how to get rid of this? i love the sound of it otherwise very unique.

Phantom

iTrader: (16)

prolly a small leak somewhere

dirt track racer 81

iTrader: (45)

DFCO..can be turned off in the tuning...danny remember your truck did this

Phantom

iTrader: (16)

10-4...scared the **** out of me the first time with my loud *** exhaust

5.3LGMC

So say when i get a Westers tune i can get it tuned better so it wont pop?

ricoc

Mine did that too. After I changed mixtures (EFILive) it stopped. I was running straight 3.5" after the Y, dumped infront of passenger rear.

Justin00SS

iTrader: (5)

I say its the glasspacks. I've never heard glasspacks on any car or truck that didn't "pop" on deceleration.

Thats trucks, camaros, mustangs, ect ect.

StrokerAce03

iTrader: (7)

It will do it regardless of the muffler but more open exhaust like a straight through glasspack will amplify the sound. Like mentioned above; its the DFCO kicking in. Get it turned off in the tune if you don't like it, but it does help with fuel economy a bit.

ricoc

DFCO stands for?

deceleration fuel cut off ?

StrokerAce03

iTrader: (7)

Yep