Catback exhaust Power Loss? - Ford Powerstroke Diesel Forum
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Old 03-08-2008, 01:55 PM
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Catback exhaust Power Loss?

i installed a 4 catback from mbrp for some reason the truck rides sluggish and slight mpg loss... its an 07
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Old 03-08-2008, 09:49 PM
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That sounds weird. I put a MBRP 4" turbo back straight pipe on my 04 6.0 and it runs like a spotted a$$ ape! Wished I could help. I'm sure your still under warranty, take it in and have the dealer run a dignosis on it and see if you may have a bad injector.
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Old 03-09-2008, 01:19 PM
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Originally Posted by TEXCRAWLER View Post
That sounds weird. I put a MBRP 4" turbo back straight pipe on my 04 6.0 and it runs like a spotted a$$ ape! Wished I could help. I'm sure your still under warranty, take it in and have the dealer run a dignosis on it and see if you may have a bad injector.
i SERIOUSLY dought it is an injector, truck has 20 k miles,stock, dont know if loss of back pressure makes it run weird or what. although i do notice less heat emitting from the tail pipe, even touched it after 20 min of driving it wasn't scorching hot like the stock exhaust. gonna talk to my shop and see what is up...
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Old 03-09-2008, 01:24 PM
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Originally Posted by f350powerstroke View Post
i SERIOUSLY dought it is an injector, truck has 20 k miles,stock, dont know if loss of back pressure makes it run weird or what. although i do notice less heat emitting from the tail pipe, even touched it after 20 min of driving it wasn't scorching hot like the stock exhaust. gonna talk to my shop and see what is up...
have you checked/changed your fuel filters ??
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Old 03-09-2008, 01:26 PM
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Originally Posted by bargecap View Post
have you checked/changed your fuel filters ??
ive changed everything a week prior ...
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Old 03-09-2008, 04:10 PM
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That does sound weird, when I put a cat- back on mine it spooled up faster and felt quicker.
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Old 03-10-2008, 04:15 PM
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dunno, maybe the cpu is figuring out the backpressure loss

felt a lot better after i ripped it on the highway 80 mph today and deff. a lot less heat from the exhaust area
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Old 03-10-2008, 04:22 PM
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backpressure isn't a problem with any motor that has a turbo on it


Maybe your truck just don't know how to act... Ya know on a cool, brisk morning when you walk outside and it takes your breath? Shoot I dunno, I'm a Seben Tree man
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Old 03-11-2008, 03:19 PM
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Originally Posted by Tikal View Post
backpressure isn't a problem with any motor that has a turbo on it


Maybe your truck just don't know how to act... Ya know on a cool, brisk morning when you walk outside and it takes your breath? Shoot I dunno, I'm a Seben Tree man


lol , btw nice stacks.
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