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  • Noise on top of exhaust noise

    Don't know if this is drivetrain, suspension, or exhaust, but here goes. Lately I've been getting this noise coming from the rear left side of my car that is a little higher pitched and louder than my exhaust (borla). It comes and goes randomly, I don't hear it on the freeway, and can hear it more frequently while turning. Hole in exhaust? Clogged exhaust? Bad cat? Suspension stuff? Beats me...I need ideas fast.

    BTW, I have 3.08 gears with no LSD.
    <b><a href=\"http://members.cox.net/95batmobile/d86f.jpg\" target=\"_blank\">Sinister Six</a> </b><br /><br />1998 Sport Metallic Gold Firebird A4:<br /><br />Whisper Lid, 5% Limo Tint, 30th Anniversary Side Stripes, 3\" Borla Catback Dual Exhaust, Man Fan Switch, SLP CAI<br /> <a href=\"http://members.cardomain.com/98goldbird\" target=\"_blank\">http://members.cardomain.com/98goldbird</a>

  • #2
    Correct that, rear right side.....and I wish I could get a sound clip but don't have access.
    <b><a href=\"http://members.cox.net/95batmobile/d86f.jpg\" target=\"_blank\">Sinister Six</a> </b><br /><br />1998 Sport Metallic Gold Firebird A4:<br /><br />Whisper Lid, 5% Limo Tint, 30th Anniversary Side Stripes, 3\" Borla Catback Dual Exhaust, Man Fan Switch, SLP CAI<br /> <a href=\"http://members.cardomain.com/98goldbird\" target=\"_blank\">http://members.cardomain.com/98goldbird</a>

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    • #3
      I have a little rattle in the back of my car as well, I think it may be a loose heat shield or something, I'm actually going to take it apart tommarrow morn to try and find out whats goin on.
      2001 Camaro A4. Magnaflow Exhaust, High flow Airbox/K&N, Painted Calipers, American racing TT2\'s, Alpine/JL system w/ custom box, custom interior, custom paint, 3.42\'s. A very nice ride

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      • #4
        Either that, or I do have a clog on the right side....I feel a lot more heat coming from that side than the left, and I don't think that's normal. Could be what's making my car run hot
        <b><a href=\"http://members.cox.net/95batmobile/d86f.jpg\" target=\"_blank\">Sinister Six</a> </b><br /><br />1998 Sport Metallic Gold Firebird A4:<br /><br />Whisper Lid, 5% Limo Tint, 30th Anniversary Side Stripes, 3\" Borla Catback Dual Exhaust, Man Fan Switch, SLP CAI<br /> <a href=\"http://members.cardomain.com/98goldbird\" target=\"_blank\">http://members.cardomain.com/98goldbird</a>

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        • #5
          I also have that same noise and it comes and goes, I have the feeling its the heat shield. :mad:
          -Paul-<br /><br />03 Lancer Evolution VIII<br /><br />1998 Camaro M5 - Traded

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          • #6
            Is it like a rattle? I had a thing like that going on a while back and figured it was just the heat shield. Then I had to do replace my o2 sensors, so I dropped my cat down and took out a fist-size peice of the insides out that had been rolling around. Now it has run great ever since.
            UAH FSAE<br />Chief Engineer<br /> <a href=\"http://chargermotorsports.com\" target=\"_blank\">http://chargermotorsports.com</a> <br /> <a href=\"http://members.cardomain.com/camaronat\" target=\"_blank\">http://members.cardomain.com/camaronat</a>

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            • #7
              Oh, one thing to keep in mind. Be sure to keep an eye on your egr valve because I had one go bad and I think it was because of that chunk of cat. I figure that the chunk would roll back and clog up the pipe when I hit the gas, which was making the egr valve have to vent to relieve the pressure(something it isn't supposed to do) and make a faint tss-tss-tss-tss sound, and ended up burning up my egr valve.

              Hope this helps.
              UAH FSAE<br />Chief Engineer<br /> <a href=\"http://chargermotorsports.com\" target=\"_blank\">http://chargermotorsports.com</a> <br /> <a href=\"http://members.cardomain.com/camaronat\" target=\"_blank\">http://members.cardomain.com/camaronat</a>

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              • #8
                I had that same problem with my borla, had to get a thick peice of rubber and glue it onto the metal peice that it was hitting. I don't have to worry about that now because I have the american thunder cat-back.
                1999 Firebird Black<br />A4 3.08 gears<br />Mods: Carbon Fiber Whisper Lid, Raised Air Box, K&N Air Filter, Direct Hits Ignition, Flowmaster American Thunder 3\", 160 Degree Hypertech Thermostat, SLP Fan Switch, 3\" High Flow Cat<br /><a href=\"http://www.cardomain.com/member_pages/view_page.pl?page_id=273903\" target=\"_blank\">My car on Cardomain</a>

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                • #9
                  How did you get your cat down....cut the pipe? cuz i have the same rattle
                  ---

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                  • #10
                    check the cat heat shield (if it has one)

                    you will need to pry at it w/ a screwdriver. If those things come loose, it will sound like a buzz (high pitched, very loud, usually when about to upshift in an auto).

                    You can fix it with jb weld...
                    2001 75th Anniversary V6 Pewter Firebird w/ Chrome Wheels, T-Tops, & Y87<br />Mods: Free Ram Air, !Silencer, Holley Filter, Full 3\" Hooker Catback, 3\" Cat<br />Best time: 15.095 at 90.00 MPH with a 2.127 60\'

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