TFRO

2 Weeks ago I put a set of Pacesetter long tubes, 3 inch Y and a single chamber flow on my 99 Z, I also dumped it infront of the rear axle. Now the car backfires when I get on the gas and then let off, kind of embarassing when it does it, will running the pipe over the axle help or is it my muffler? Any help please.

g-ryde1

iTrader: (3)

mine does the same thing, did the same with my flowmaster before the header install

wondering the same tho

RedRallyeZ

iTrader: (20)

mines run over the axle and still pops, but like you said, only when i compression brake. its not that bad if you ask me...

SOMbitch

iTrader: (8)

If you didn't get a tune you may get a backfire cause it is running rich and dumping fuel. Some chambered mufflers just pop on deceleration (my single chamber does). does it sound like a gunshot (backfire) or a little less intense (normal).

TFRO

I would say it sounds more like a gun shot on hard accel and just little pops on normal driving.

BLACK2001SS

I'd cleen out your MAF (stp MAf cleener) and check to make shure your plug wires are all connected good.

penningta

iTrader: (3)

Are you still running AIR because it woud be dumping air and fuel into the exhaust and getting hot and igniting in the exhaust

TFRO

nope got all the air / egr deleted