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What the??? My truck has no muffler and I didn't even know.

 
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QwkTrip
11sec Club


Joined: 17 Feb 2004
Posts: 3942
Location: Peoria, IL

1989 Pontiac Firebird
PostPosted: Sun Jul 26, 2009 8:03 pm    Post subject: What the??? My truck has no muffler and I didn't even know. Reply with quote
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! Laughing

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
PostPosted: Sun Jul 26, 2009 8:28 pm    Post subject: Reply with quote
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
PostPosted: Mon Jul 27, 2009 4:40 am    Post subject: Reply with quote
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
PostPosted: Mon Jul 27, 2009 8:18 am    Post subject: Reply with quote
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
PostPosted: Mon Jul 27, 2009 8:30 pm    Post subject: Reply with quote
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
PostPosted: Tue Jul 28, 2009 11:03 am    Post subject: Reply with quote
I know that my 96 had a factory cat.
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