SSAshby

I put LTs and an ory and my ses light is on. Its the Knock sensor,p0327. It was fine before the headers. I don't know where to start. Also my crapy Flowmaster is now raspy and rattling at 2000rpm to 2500rpm. Could the muffler cause this code?

psykoTA

iTrader: (4)

Your y-pipe banging on anything? The LT's hitting anything?

SSAshby

the y pipe has plenty of clearance but the driver side o2 sensor is really close to the heat shield.

psykoTA

iTrader: (4)

I would start there. Are you sure its the muffler rattling, and not something up front? All clamps tight? Any sort of rattling or tapping or banging will set a knock sensor code.

psykoTA

iTrader: (4)

Oh, what brand LT's and ORY?

SSAshby

I'm pretty sure the muffler is doing it. I had my friends listen. It sounds like a truck with glass packs. It happens at part throttle between 2000 and 2500rpm

psykoTA

iTrader: (4)

Sounds like something is loose. Like the ORY to intermediate pipe connection. Can you hear any exhaust leaks?

SSAshby

I have a small one at front of the catback, but its not that noticable. I just see condinsation dripping at the connection

psykoTA

iTrader: (4)

Well, if your hearing a rattle, then somethings loose or not tight enough. Fix the rattle you hear (heatshields, clamps, etc..) and the code will most likely disappear. Oh, and you cant wear out a Flowmaster, theres nothing to wear out.

As soon as I get an ORY, I will be putting my QTP's on, and I have a Flowmaster (came with the car) I am kind of anxious to hear what it sounds like. My chevelle with dual 40 series Flo's rocks

SSAshby

sweet. thanks

oange ss

iTrader: (50)

Flowmaster + ORY = shitty sound

psykoTA

iTrader: (4)

That sucks, Ill see what its like, if anything Ill weld in a sweet thunder.