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HELP...BANGING ON MY FLOORBOARDS?????

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Old Apr 20, 2002 | 10:00 PM
  #1  
ssarge's Avatar
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From: new hyde park,ny
Default HELP...BANGING ON MY FLOORBOARDS?????

Just got the car back on the road after all the mods but know when I accelerate all I hear is thump,thump,thump from under the driver side floor...What gives??? I installed SLP LT's,LM,CAI,air lid,3.73's,SY3500,STB,SFC,LCA,PHR
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Old Apr 20, 2002 | 10:03 PM
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wizkid's Avatar
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Default Re: HELP...BANGING ON MY FLOORBOARDS?????

Maybe your y-pipe needs some minor adjustment. Pretty common problem after an install. I hate fooling with exhaust.

Eric
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Old Apr 20, 2002 | 11:24 PM
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Default Re: HELP...BANGING ON MY FLOORBOARDS?????

Was it the Mustang driver you ran over doing the banging?? <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> Bwahhhaaa
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Old Apr 21, 2002 | 12:29 AM
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flyin red TA's Avatar
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Default Re: HELP...BANGING ON MY FLOORBOARDS?????

Has to be the driver side of the Y pipe. When you accelerate hard, due to the way the engine twists, that side of the y gets forced up towards the floorboard.

<small>[ April 21, 2002, 12:30 AM: Message edited by: JimTA ]</small>
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Old Apr 21, 2002 | 10:27 AM
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Default Re: HELP...BANGING ON MY FLOORBOARDS?????

What I heard that you have to do is first, locate where your ypipe is banging. Then, loosen up the exhaust and mount a 2x4 block in the banging area. Tighten up the bolts, and then knock out the 2x4.
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Old Apr 21, 2002 | 11:10 AM
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Default Re: HELP...BANGING ON MY FLOORBOARDS?????

I agree that it's probably the driver's-side of the y-pipe. Some have used a crow bar to bend the y-pipe down some, and it has worked. Others have used some fuel injection hose to provide a cushion between the y-pipe and floorboard, and the problem was solved. Just look for the scuff marks on the bottom of the car.
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Old Apr 22, 2002 | 12:02 AM
  #7  
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Default Re: HELP...BANGING ON MY FLOORBOARDS?????

thanks guys I think your right it might be the y-pipe. some guy at slp day said if I shim the tranny crossmember that it may move everything enough to solve the problem. what do you think.
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Old Apr 22, 2002 | 12:23 AM
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Default Re: HELP...BANGING ON MY FLOORBOARDS?????

I had the same problem with my 99 TA when I had my SLP headers and Y pipe installed the Y pipe was banging into the floorboard when I hit gas hard. I took it back and they took took the pipe off and heated up the top of the pipe and melted it down a little so it would stop hitting. It is a real pain in the as though.
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Old Apr 22, 2002 | 09:38 PM
  #9  
ssarge's Avatar
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From: new hyde park,ny
Default Re: HELP...BANGING ON MY FLOORBOARDS?????

the shims worked for the most part but still some baning on hard acceleration. any suggestions.
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