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4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

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Old 07-17-2017, 07:02 AM   #1
lonzee
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Default 1999 gt

i have a gt that has an rotten egg smell and not much power I'm thinking the cats are clogged
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Old 07-17-2017, 08:38 AM   #2
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How many miles on the car? Any maintenance done recently?
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Old 07-17-2017, 11:27 AM   #3
Z28KLR
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Likely yes. Any codes (check engine light on)? If so, please post what they are.

Worth noting though is that catalytic convertors generally don't go bad on their own. Generally there were/are other issues that lead to it, such as prolonged misfire condition which will cause raw fuel to make it into the catalyst and then when it gets there it ignites and eventually melts the catalyst material.
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Old 07-17-2017, 01:24 PM   #4
lonzee
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the car was just picked up it has 150000 miles it drives but loses power when I try to accelerate
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Old 07-17-2017, 08:25 PM   #5
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I'd pull that mid pipe. Replace it with whatever floats your boat, be it another stock mid, x, H, etc..
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