Honda Civic Performance - JDM Discussion Engine tech, forced induction, springs, shocks, brakes, tires, etc.

exhaust smell

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Old 04-May-2006, 01:07 PM
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exhaust smell

anyone ever experience exhaust gas coming back inside the car from the tail pipe???
car is a 91 hatchback and i notice when i have sunroof open its worst...
closed windows and everything is fine
but with summer coming up its gonna be tough
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Old 04-May-2006, 01:12 PM
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Got the same prob right now. Roof open= one big *** headache.
My muffler is broken right now however so that doesn't help.
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Old 04-May-2006, 01:36 PM
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weired problem, but car might be running rich? did you guys check to see underneth the car to see if there are any leaks or anything?
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Old 04-May-2006, 01:39 PM
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i had a guy install a used cat for me 2 weeks ago and he repiped everything
and theres no leaks as far as i noticed
so i know the exhaust is basically coming back in.. and i have no idea this is even possible so im kinda stumped and its either get high with carbon monoxide or sweat my *** with windows up
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Old 04-May-2006, 02:39 PM
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Is it an aftermarket mandrel bent exhaust?

The mandrel bending process leaves oil in the piping. When they're new they burn the oil and that's what you smell. It should go away tho.

Did you get the car rust proofed recently? That could do it too.

Otherwise; I'd look for holes in your trunk area letting exhaust through.
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Old 04-May-2006, 03:02 PM
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no its not fancy the piping at all
and i dont think theres holes because when the windows are up u cant smell any exhaust but once there down u smell it when im taking off or when the engine revs
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Old 04-May-2006, 03:14 PM
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is there fuel leaking in/on your engine.... the smell could be coming from the engine compartment and could be quite dangerous.
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Old 04-May-2006, 03:34 PM
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no gas leaking...
im 100% sure its exhaust smell
what i dont understand is why is it coming back in from outside??
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Old 04-May-2006, 05:23 PM
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out of all 4 ED chassis civic/crx, first gen crx and my sts I have never experienced exhaust fumes coming in via the sunroof when open. only time ever was if I had my hatch open to transport cargo would fumes enter the cabin
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Old 04-May-2006, 08:41 PM
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Is it a kind of.. lol i cant describe the smell..but i know what your talking about.
Your either burning oil ( How hard are you driving it? )
Or your running really rich.
Check your oil level too.

______

>oh if you have a swapped motor do you have the proper sized piping. Cause i know some ppl dont get their exhaust done after a swap to a more powerfull engine (lol not gonna name names) therfore causing back up in the piping..
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Old 04-May-2006, 11:56 PM
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oil level is good not burning as far as i know... as for running rich maybe so...
what other signs would i get if im running rich??? and what should be done if i am ie spark plugs?
thanks
o and today i drove for a block with my hatch partially open and its definetly same smell that im smelling
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Old 15-May-2006, 10:42 AM
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black smoke coming out of your tail pipe
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Old 15-May-2006, 12:15 PM
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You could have a leak on your exhaust system up front near the header / downpipe / cat converter.
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