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QwkTrip 11sec Club

Joined: 17 Feb 2004 Posts: 3942 Location: Peoria, IL
1989 Pontiac Firebird
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Posted: Sun Jul 26, 2009 8:03 pm Post subject: What the??? My truck has no muffler and I didn't even know. |
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I was under my Ford Superduty 7.3L diesel today changing rear shocks when I noticed I have no muffler on the exhaust system. I've been driving the truck for 2.5 years and had no idea!
All I can say is that Ford makes one tight cab because it is quiet besides the clatter from the engine bay. |
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rjmcgee The Hammer

Joined: 08 Jan 2004 Posts: 2328
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Posted: Sun Jul 26, 2009 8:28 pm Post subject: |
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| Still have the catalytic converter under there? I removed it and the muffler on mine a few years ago, only differance it made in sound at idle was alot of turbo whistle. WOT is pretty loud though. |
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QwkTrip 11sec Club

Joined: 17 Feb 2004 Posts: 3942 Location: Peoria, IL
1989 Pontiac Firebird
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Posted: Mon Jul 27, 2009 4:40 am Post subject: |
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| No catalytic converter. Straight pipe all the way. Actually, I don't think diesels have catalytic converter anyway, do they? |
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91RSVert Member
Joined: 16 May 2007 Posts: 2736 Location: AR
1991 Chevrolet Camaro RS
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Posted: Mon Jul 27, 2009 8:18 am Post subject: |
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| My 6.5 TD has no cat or muffler... factory. Just a soot trap which doesnt work to well. |
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dlp Member
Joined: 28 Mar 2005 Posts: 374 Location: Bothell, Wa
1990 Chevrolet Camaro IROC-Z
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Posted: Mon Jul 27, 2009 8:30 pm Post subject: |
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| The EPA started mandating CATS in 04, CA had them a year earlier. I believe 04 was also the first year for the EGR on diesels, bad idea. Lots of soot re entered into the intake tract = lots of plugged EGR valves. The emmission equipment requirements have gotten worse every year since 04. |
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rjmcgee The Hammer

Joined: 08 Jan 2004 Posts: 2328
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Posted: Tue Jul 28, 2009 11:03 am Post subject: |
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| I know that my 96 had a factory cat. |
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