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Mystery rattling noise when downshifting in tip mode, please help!!!

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Old 07-20-2007, 09:05 PM
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Default Mystery rattling noise when downshifting in tip mode, please help!!!

If I downshift in tip mode from 3rd to 2nd for example and it shifts into the lower gear at anything above 3K RPM, while it's winding down, it makes this rattling/knocking noise right below the armrest. If literally sounds like something is vibrating/shaking against the undercarriage of my car. Can anyone help me diagnose this issue?

If it's any concession, the noise started after my piggie pipes where installed. Not sure if that makes a difference considering that they alter the interior of the pipes versus the exterior.

Any help would be greatly appreciated!
Old 07-20-2007, 09:07 PM
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if the piggies move the O2 locations, I'm guessing one of them is touching a heat shield or somethin
Old 07-20-2007, 09:11 PM
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Where are the 02's located to? Also, any other people w/ P-pipes experience this?
Old 07-20-2007, 09:29 PM
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Default There is some heat shielding that can be "massaged" out of the way if they are rubbing...

Uber is referring to the S2 (rear O2's) which, if relocated, are behind the cats.
Old 07-20-2007, 10:11 PM
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okay, so do you think it's 99.9% comming from the P-pipes. I just want to rule out trans trouble
Old 07-20-2007, 11:57 PM
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Default No- I was just commenting on the O2's location that Uber mentioned. I'd rule out the simple stuff...

first though.

I have no Tip experience but I have had a few rattles to track down over time.
Old 07-21-2007, 05:29 PM
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yep rule out rubbing from heat sheilding due to O2 or any other thing touching it.
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