Mystery noise under car
Thread Starter
Instructor
Joined: Dec 2014
Posts: 165
Likes: 5
From: Phoenix Az.
Mystery noise under car
It's a 99 FRC. Going over bumps, or road irregularities, I hear something that sounds like there is someone under the car with a small hammer, tapping on the floor pan. It's over towards the passenger side, near the front of the passenger seat. But I will also add that it sometimes sounds like it is originating a little more forward, or even towards the driver side around the front of the center console (but still under the car).
Today I had it up on a lift. Me and another guy poked, prodded, used flashlights and other things, looking for any sign of something loose, and found nothing. For a while, I thought it may have been the oil pressure sending unit which I dropped down behind the engine while installing it (the act of stupidity is documented here in another thread). I pondered if that part was maybe somehow bouncing around under the car, maybe on the exhaust system, or somewhere else, and when things moved/flexed a bit under normal driving, maybe the sensor was making contact with the belly of the car. Wild guess, I know, but I'm stumped.
Ideas?
S.C.
Today I had it up on a lift. Me and another guy poked, prodded, used flashlights and other things, looking for any sign of something loose, and found nothing. For a while, I thought it may have been the oil pressure sending unit which I dropped down behind the engine while installing it (the act of stupidity is documented here in another thread). I pondered if that part was maybe somehow bouncing around under the car, maybe on the exhaust system, or somewhere else, and when things moved/flexed a bit under normal driving, maybe the sensor was making contact with the belly of the car. Wild guess, I know, but I'm stumped.
Ideas?
S.C.
Melting Slicks
Joined: Nov 2008
Posts: 3,146
Likes: 203
From: Edmonton Alberta, Canada
Any one?? I would check in storage compartments, lift struts, trunk hinges, etc as many of these noises telegraph and are hard to say from where they originate. (On rare occasion I hear a similar noise as you describe so interested in your posts responses) PS check your cats if ceramic product used is breaking down inside. Can check with rubber hammer by tapping cats and listen if anything is rattling around inside...just a thought. Good luck.
Melting Slicks
Joined: Aug 2014
Posts: 2,470
Likes: 460
From: East Windsor NJ
Racer
Joined: Sep 2004
Posts: 324
Likes: 2
From: Rogersville TN
Rear hub splines
Cheers, Curt
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