Pulled a 14,500lbs 5th wheel for 600 miles.... - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 13 (permalink) Old 03-02-2009, 04:00 AM Thread Starter
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Pulled a 14,500lbs 5th wheel for 600 miles....

Got my totally stock f450 dually and left to Reno to buy a 14,500lbs Toy hauler. Truck did great, averaging 7mpg combination steady 4% uphill pull and elevation of 4,500 to 6200ft above sea level (overtook an anemic new looking Dodge with a much lighter RV). Yeah, it is ****ty fuel mileage, but oh well! One thing was quite interesting....I was hauling my toy hauler up an 8-10% grade for about, oh, 120 yards and everything going well when suddenly my 6.4 had a sudden new sound......sounded like a distant muscle car at wide open throttle. I looked around and was looking for a Mopar Hemi, or a Ford 451 cleveland...but I was the only one there. I let go of the gas pedal and the sound went away. I thought....what the hell was that?? No power loss, just that low grunt/rumble. Anybody with any ideas of what was going on??

Need to do something about that ridiculous low fuel mileage!
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post #2 of 13 (permalink) Old 03-02-2009, 04:17 AM
 
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Originally Posted by 08-450dually View Post
Got my totally stock f450 dually and left to Reno to buy a 14,500lbs Toy hauler. Truck did great, averaging 7mpg combination steady 4% uphill pull and elevation of 4,500 to 6200ft above sea level (overtook an anemic new looking Dodge with a much lighter RV). Yeah, it is ****ty fuel mileage, but oh well! One thing was quite interesting....I was hauling my toy hauler up an 8-10% grade for about, oh, 120 yards and everything going well when suddenly my 6.4 had a sudden new sound......sounded like a distant muscle car at wide open throttle. I looked around and was looking for a Mopar Hemi, or a Ford 451 cleveland...but I was the only one there. I let go of the gas pedal and the sound went away. I thought....what the hell was that?? No power loss, just that low grunt/rumble. Anybody with any ideas of what was going on??

Need to do something about that ridiculous low fuel mileage!
If I were to guess, I would say that your truck went into a regen cycle. And you are not the only stock truck with bad fuel economy. I get 8-10 towing 14k out of West Virginia. The bad economy is due to the Diesel Particulate Filter or DPF. This now standard on all 07.5 and newer trucks. Soot created by the diesel engine gets trapped in this filter. When the filter starts to get full, regen occurs. The EGR (exhaust gas recirculation) disables, extra fuel is added on the exhaust stroke, which increases exhaust gas temps to burn the soot out of the dpf. So there is more fuel used. A lot of people, including myself are getting rid of the dpf's and getting tuners to go along with it. You need some kind of computer programming to disable the regen cycle. And if this makes you mad, thank the wonderful EPA.
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post #3 of 13 (permalink) Old 03-02-2009, 04:45 AM Thread Starter
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Hi Greenhorn. Yup, I know all about the regen cycle and had a feeling it was regen during that time, but I always get "cleaning DPF" on the dash when it happens. It was not on. Anyway, I do want to get rid of that DPF/exhaust plug and am considering Spartan.....But.....I'm not convinced yet they have all the bugs ironed out on the cold weather issue. I know many have posted accolades of the newest tunes, but I get the feeling many are just excited about their new toy. I'll just wait a little more.....
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post #4 of 13 (permalink) Old 03-02-2009, 12:02 PM
 
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Originally Posted by 08-450dually View Post
Hi Greenhorn. Yup, I know all about the regen cycle and had a feeling it was regen during that time, but I always get "cleaning DPF" on the dash when it happens. It was not on. Anyway, I do want to get rid of that DPF/exhaust plug and am considering Spartan.....But.....I'm not convinced yet they have all the bugs ironed out on the cold weather issue. I know many have posted accolades of the newest tunes, but I get the feeling many are just excited about their new toy. I'll just wait a little more.....
I have yet to get rid of my DPF with the spartan tuning. Sometime this week when the pipe and sensors come, it is going bye bye. I am not a vendor or salesman for them, but they do seem to have the bugs ironed out with the cold weather tunes. I have been researching what I wanted to do since July of 08 pretty hard. I have literally spent weeks of time on the internet looking at what everyone has to offer. I went with Spartan because they only deal with the new powerstrokes. The owner, Matt races his, daily drives it, and I think he even tows with it, and no problems. There are some guys that have had the tuning for 20k or more with no problems, other than the known Ford ones.
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post #5 of 13 (permalink) Old 03-02-2009, 06:08 PM Thread Starter
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Well, I can see how Mats truck would run great. He has the equipment and know-how to custom change and manipulate all variables to his one truck. If only all trucks were created equal then there would be less of a problem when broadcasting tunes for the masses. But, from what I've been reading, every truck is different, hence, the different fuel mileage, power etc.,

I've been thinking that perhaps the best, best, best thing to do is to send my truck to him and have him custom tune it right there and then. But, I'm sure this would take too much time and then everyone would want to to it.
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post #6 of 13 (permalink) Old 03-02-2009, 10:53 PM
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Question Cooling Fan

Quote:
Originally Posted by 08-450dually View Post
Got my totally stock f450 dually and left to Reno to buy a 14,500lbs Toy hauler. Truck did great, averaging 7mpg combination steady 4% uphill pull and elevation of 4,500 to 6200ft above sea level (overtook an anemic new looking Dodge with a much lighter RV). Yeah, it is ****ty fuel mileage, but oh well! One thing was quite interesting....I was hauling my toy hauler up an 8-10% grade for about, oh, 120 yards and everything going well when suddenly my 6.4 had a sudden new sound......sounded like a distant muscle car at wide open throttle. I looked around and was looking for a Mopar Hemi, or a Ford 451 cleveland...but I was the only one there. I let go of the gas pedal and the sound went away. I thought....what the hell was that?? No power loss, just that low grunt/rumble. Anybody with any ideas of what was going on??

Need to do something about that ridiculous low fuel mileage!
Are you sure that wasn't the engine cooling fan kicking on causing all that noise?

2008 F450 6.4 diesel dually loaded.
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post #7 of 13 (permalink) Old 03-02-2009, 11:03 PM
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Transmission Cooler!

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post #8 of 13 (permalink) Old 03-02-2009, 11:04 PM
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Are you sure that wasn't the engine cooling fan kicking on causing all that noise?
Ill bet it wasn't a Ford 451 Cleveland

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post #9 of 13 (permalink) Old 03-02-2009, 11:33 PM
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Ill bet it wasn't a Ford 451 Cleveland
Thats exactly what I was thinking.

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post #10 of 13 (permalink) Old 03-02-2009, 11:45 PM
 
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Are you sure that wasn't the engine cooling fan kicking on causing all that noise?
I'm retarded. I don't know why I didn't think of that:
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