This is fairly common. I'm pretty sure its just exhaust gases escaping between shifts, to achieve equilibrium with ambient air pressure. Don't quote me but thats my educated guess. Are you running larger pipes?
Red 86 Dx
>From: "Robin Turner" <[EMAIL PROTECTED]>
>Reply-To: "Robin Turner" <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: CRX: pop sound
>Date: Thu, 27 Jun 2002 02:33:12 +0000
>
>
>
>when I am driving and decellerate, or downshift sometime, I hear a
>popping
>sound from my exhaust. My exhaust tips are also black on the inside.
>I don't
>think this is normal, If any one could suggest what is wrong and how
>I might
>fix it.
>
>Robin
>88 CRX Si
>
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