Need help figuring out a noise - Miata Forumz - Mazda Miata Chat Forums
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NA (1989-1997) NA Miata discussion within. The MX5's first generation, the NA, sold over 400,000 units from 1989 to 1997.

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Old 07-09-2013, 11:42 PM   #1
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Default Need help figuring out a noise

Ok need help figuring out a noise.

I should start out by saying my car is a 1996 manual, with a jackson racing m45 supercharger on it.

Anyways, I am driving down the road in 3rd at full throttle and boost. I hear a noise like a rock hitting the side of the car. It was a loud crack like a rock hitting a body panel, sound came from passenger side. Then the battery light came on. I assumed I had broke a belt, but the belt seems to be fine. (tho a little loose). I then thought that maybe my battery had cracked and popped. The battery appears to be fine. After a mile or so the battery light went off, and the car drove fine. I limped it the extra 2 miles home, but can't think of what else it could be. When I got home I shut it off, then tried to start it, thinking it would have trouble turning over. It started just fine, I don't seem to have any power issues now.

Just looking for ideas, so I can have a starting place tomorrow morning. Thanks for any help in advanced. Sorry for lack of description.
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Old 07-10-2013, 08:40 AM   #2
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Check the starter and alternator wiring. Something may have come in contact with the wires and caused a brief short. Something could have fallen out or bounced up. Are you missing any tools?
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Old 07-11-2013, 09:40 PM   #3
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Ok so I found the issue, I lost the alternator tension-er bolt. Thats easy enough to find.

But I also lost the other bolt (that holds the alternator), that lets the tensioner work. This is the worst description ever so I will back it up with some shitty MS paint artwork.
I lost the circled piece.

Anyone know where I can buy one, or what they are called. I can always Jerry-rig it if I have to.
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Old 07-12-2013, 06:44 AM   #4
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