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Joined: Apr 2003
Posts: 1,917
Blue MnM
2003 Toyota Celica
Blue MnM
2003 Toyota Celica
Joined: Apr 2003
Posts: 1,917
well i have my exhaust for about a month now and im loving it
but my question is, yesterday after driving my car a couple of hours and when i park it(with the engine running) i was listing to my exhaust and there was a cracking sound coming from it, it wasn't a loud cracking but is noticable if you're standing by the exhaust. now is this normal????

Joined: May 2002
Posts: 3,286
ECelica Staff
2001 Toyota Celica GTS
ECelica Staff
2001 Toyota Celica GTS
Joined: May 2002
Posts: 3,286
when things heat up they expand. when your exhaust heats up, it expands too. This is normal, yours does it and mine does it.

Joined: Jul 2002
Posts: 10,110
05 WRB
2005 Subaru WRX STi
05 WRB
2005 Subaru WRX STi
Joined: Jul 2002
Posts: 10,110
is it back firing?


SUBARU TECNICA INTERNATIONAL

Joined: Oct 2002
Posts: 2,667
ECelica Staff
ECelica Staff
Joined: Oct 2002
Posts: 2,667
Originally Posted by Steven
when things heat up they expand. when your exhaust heats up, it expands too. This is normal, yours does it and mine does it.

Mine does it too ... and if you listen real carefully after driving th engine compartment does it too ... it's more pronounced if you park in a garage

Joined: May 2002
Posts: 3,286
ECelica Staff
2001 Toyota Celica GTS
ECelica Staff
2001 Toyota Celica GTS
Joined: May 2002
Posts: 3,286
Mine back fires because I have no resonator on my mid-pipe and I disconnected the TSRM muffler part and replaced it with just piping as some of you know. When ever you replace your exhaust system, in most cases and certainly mine, there are times when the backpressure significantly drops and then rises again once you step on the gas and exhaust fumes are pressurized as they try to escape the piping. When you step on the gas, pressure builds, and then when you get off the gas instantly, the area of piping that should have been filled with pressurized exhausts fumes is now in a lower pressure than the rest. This creates a vacuum if you will, and may suck un-burnt gasoline into the headers and mid pipe when it is then ignited by flame leaving through the exhaust ports. To my understanding that is why cars like mine, backfire. Hope that helps...
Steven

Joined: Apr 2003
Posts: 1,917
Blue MnM
2003 Toyota Celica
Blue MnM
2003 Toyota Celica
Joined: Apr 2003
Posts: 1,917
thanks guys i guess i have nothing to worry about, as far as backfiring mines does the same thing as steven, especially when i slow down then speed up again

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nebraskaGTS
2000 Toyota Celica
Nebraska

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