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Old 10-02-2011, 07:32 PM   #1
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Default Rattling Noise

Hey today just starting hearing a rattling noise during acceleration. It would only make the noise while accelerating and then quit when I let off the gas. I can hear it coming from the floor in the cab of the pickup. I just replaced the catalytic converter in my wife's 2006 ford focus, so I might be a little gun shy about this being the noise.

I need to get under it and do some banging around and see if the cat is broken up on the inside, but I noticed something. Did they put 2 cats on the 1995 F150's with a 5.8L. It looks like it has two anyway, two pipes come out of the engine and come together in what looks like the first cat then the pipe continues for about a foot and a half and goes into what looks like another cat.

What do you guys think?
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Old 10-02-2011, 09:16 PM   #2
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Originally Posted by smilin_todd
Hey today just starting hearing a rattling noise during acceleration. It would only make the noise while accelerating and then quit when I let off the gas. I can hear it coming from the floor in the cab of the pickup. I just replaced the catalytic converter in my wife's 2006 ford focus, so I might be a little gun shy about this being the noise.

I need to get under it and do some banging around and see if the cat is broken up on the inside, but I noticed something. Did they put 2 cats on the 1995 F150's with a 5.8L. It looks like it has two anyway, two pipes come out of the engine and come together in what looks like the first cat then the pipe continues for about a foot and a half and goes into what looks like another cat.

What do you guys think?
Its not just the 95. I'm fairly sure it is a ruble cat system. But I've also heard the second one is a resonator. But when I looked up exhaust stuff for my truck (92/302) there were cat converters labeled "front" (which all pretty much looked like the stock one) and "rear".
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Old 10-03-2011, 05:02 AM   #3
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my 96 has what looks like 2 cants too. i would check for lose bolts too while your down there. when i first bought my truck it would make a rattling sound because the bolt for the heat shield on the cat was broken and rattling.
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