Scratching Sound When Engine Breaking?

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01-24-2013, 06:22 PM

#11

danman281

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Quote:

Originally Posted by 4forall

I know my fog lights make a sort of scratching sound like that at certain RPMs, they are just vibrating in their housings/bumper.

So could be a loose bumper bolt near the fender or somthing similar.

Last thing i can think of would be LMA's (Loss Motion Assembly). But i have not heard of any going bad in the F20, mostly B-Series motors.

I really hope this is something as simple as fender or bumper rattle. Sometimes I can hear it and sometimes I can't so perhaps you are right. Not sure!

Quote:

Originally Posted by drobinson1692

I thought that ap2's could still clutch buzz but no where to the extent ap1's did. I thought it was just audible backlash, sometimes drony with scraping...

mine sure does.

Does yours only happen when you engine brake?

Quote:

Originally Posted by Reckon

The video or sound clip will be the best thing to help here. So many noises with the S, hard to pinpoint it without more information.

I actually have a video I took this morning.
The sound comes on the last rev very faintly but you can hear it
youtube.com/watch?v=Yv4n4tKGnlo&feature=youtu.be
http://www.youtube.com/watch?v=Yv4n4...ature=youtu.be

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01-25-2013, 07:26 AM

#12

4forall

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Very very hard to tell anything from that video. Too much road/wind noise.

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01-25-2013, 10:04 AM

#13

Reckon

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I heard a very faint rattle not so much a scratching. Sounds like something is loose more than anything else. Double check all of the bolts in the engine bay and check to see if something looks like it was adjusted (i.e., was modified and then put back to stock). You may need to take another video but with someone else in the car so that they can focus in on the noise while you drive.