Is this true????
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Junior User
Joined: Jan 2004
Posts: 86
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From: Jefferson, Iowa
Is this true????
I am about to take a certain part of the exhuast system out (meow) and someone told me that he did this and his fuel milage went down the crapper. He has also done numerous mods to this truck and I would rather think the poor milage is do to these mods. Has anyone else heard of losing fuel milage with no kitty? 
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
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From: Cabot, Arkansas
Originally Posted by powerstrokefreak
I am about to take a certain part of the exhuast system out (meow) and someone told me that he did this and his fuel milage went down the crapper. He has also done numerous mods to this truck and I would rather think the poor milage is do to these mods. Has anyone else heard of losing fuel milage with no kitty?
Lead Driver
Joined: Apr 2003
Posts: 9,965
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From: H-town, MN
Not I. I haven't heard of that. I have heard of gaining HP though. I would think it would get better MPG because its less restrictive. I removed mine when I put on 4" exhaust and didn't notice any difference. Just my 2 cents.
Elder User
Joined: Dec 2002
Posts: 797
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From: UT
My 2000 PSD doesnt have one. I looks like to me that it never came with one. I am the second owner, and it shows no sign of ever being removed. Just the same old rusty pipes it came with. I get about 17 MPG. I say about because I have taller tires throwing off my odometer.
New User
Joined: Apr 2004
Posts: 15
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From: Las Vegas
In Nevada there are Smog checks now. They just started this about a year ago. I do not have a cat on my truck and it passes no problems.
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Posting Guru
Joined: Apr 2003
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From: Marysville, Wa
smog checks for diesels are generally different anyways. in washington they do opacity checks. Test to see how much smoke you make
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Senior User
Joined: Feb 2004
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From: Louisville, KY
it is not a cat, a cat is used to reduce hydrocarbons, non of which a diesel produce.
that is a smog canister that is packed with wire, guaze, and charcoal. it does nothing but ford put it there as a sorry excuse for reducing emmissions
that is a smog canister that is packed with wire, guaze, and charcoal. it does nothing but ford put it there as a sorry excuse for reducing emmissions
Senior User
Joined: Apr 2004
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From Ford 7.3L service manual:
"The Diesel catalytic converter is designed to only oxidize the "soluble oil fraction" of diesel hydrocarbons. Other hydrocarbons, NOX, CO, and particulates are controlled in the combustion process."
"The Diesel catalytic converter is designed to only oxidize the "soluble oil fraction" of diesel hydrocarbons. Other hydrocarbons, NOX, CO, and particulates are controlled in the combustion process."
