HELP: new muffler installed but making strange noise
#1
HELP: new muffler installed but making strange noise
I have a question I just installed a magna flow muffler onto my 07 WRX and it seems to be doing fine until I reach about 3,000RPM when the exhaust note makes a sudden change in sound. I understand that the faster you go the sound will get louder but it seems that it just makes a quick change from its normal sound to a real odd back firing sound. Just wanted to know if this is normal?
I should also note that just the muffler was installed using a 3inch pipe that was clamped on to the two inch pipe. there doesnt seem to be an exhaust leak from anywhere. I did not reaplace anything else just the muffler.
it should also be noted that this only happends when I'm driving. when I try reving the car it does not make that sound.
please sorry if this sounds stupid. I never have done any modifications to any car. i'm really curious if there is somthing wrong with the way the guy installed the muffler and maybe a little paranoid.
I should also note that just the muffler was installed using a 3inch pipe that was clamped on to the two inch pipe. there doesnt seem to be an exhaust leak from anywhere. I did not reaplace anything else just the muffler.
it should also be noted that this only happends when I'm driving. when I try reving the car it does not make that sound.
please sorry if this sounds stupid. I never have done any modifications to any car. i'm really curious if there is somthing wrong with the way the guy installed the muffler and maybe a little paranoid.
#2
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Join Date: Aug 2006
Location: milton, fl
Posts: 1,218
Car Info: 2006 San Remo Red WRX
You could be getting air somewhere in the exhaust that's causing the backfire. I installed a magnaflow on my 3" turbo back and have had no problems. It's hard to say since you have nothing else done to the car.
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M4d_r3x
Engine/Power - EJ25T (STI and 2006+ WRX)
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01-12-2007 11:24 AM