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-   -   wtf? back fire?? (

manato 05-16-2003 01:45 PM

wtf? back fire??
i got a 2003 wrx brandnew
have intalled the greddy evo catback on it...
thing is ever since then. if i run on the freeway abit hard and then lift my feet of the gas the car in gear i can hear knocking sound from right under me. it sounds like its coming from where the downpipe connects to the exhaust? o_O

I check under the car i don't see any signs of scratch or dent so the sound is not physical. there is no parts rubbing.

i checked the exhaust tip and the thing have not broke in yet so its still clear no signs of black residue :)

anyone have same case?

Subie Gal 05-19-2003 06:03 PM

well you said it...
you installed a cat back :)

thus you've now opened up the air flow.

did you remove the resonator as well?

if so, now all of the baffled air is flowing freely :)
the back fire was always there, you just couldnt hear it

this is VERY NORMAL for a modified exhaust.
even my 2.5 RS (n/a) does the same thing ;)

have fun and relax... your car should be fine
that's my bestest guess anyway :)

if it's not a clanging obvious rattling noise..
it's probably just the exhaust flow you're hearing?


Th3Franz 05-19-2003 06:08 PM

Unless it's the exhaust pipe moving around since it's just on hangers? If that's the case you shouldn't have to worry really unless it's moving around a LOT.

manato 05-19-2003 06:35 PM

thanks. that reasures me :(
in the canyons its kinda annoying hehehe

Th3Franz 05-20-2003 02:13 PM

You've just got a bit more talkative Subie I guess. :D

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