7.3 Mileage Issues - Ford Powerstroke Diesel Forum
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Old 03-23-2013, 04:05 PM
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7.3 Mileage Issues

Howdy!

I just put a wonderful 7.3 on the road. It's a '99 F-250, reg cab, long bed. I have a 1500 pound welder generator mounted inside the box. I added two extra springs on each side in the back. She sits nice.

I'm having major fuel mileage issues. For 130-140 litres of diesel, I'm barely getting 400 kilometers per full tank of fuel.

Mind you, I deleted the muffler (four inch pipe all the way down), and installed an Air Raid cold air intake. The previous owner told me that I should be getting 800 kilometers plus in the winter, and a thousand kilometers plus in the summer months.

Something ain't right. I don't know what to do.

FYI, I just changed all glow plugs, glow plug relay, valve cover gaskets, and block heater.

If you dudes have any advice, I'm all ears.
What type of mileage should I be getting?

Thanks!
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Old 03-23-2013, 06:08 PM
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woah.......thats about 7miles per gallon, i get about 15mpg with a 99 Extended cab long bed. So a little over 900 kilometers on 38 gallons of fuel (143liters) a little less in the winter like now.
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Old 03-23-2013, 06:47 PM
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Well, how do you drive it? How fast? How much idling? What RPMs do you run?
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Old 03-23-2013, 07:06 PM
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Clean your EBP tube and sensor, possibly replace the sensor. My mileage was in the single digits until I cleaned mine.
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Old 03-24-2013, 10:03 AM
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Check for boost leaks, boots were killing my mpg
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Old 03-24-2013, 01:01 PM
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WelderDude, where are you located?
Thats pretty bad mileage
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Old 03-24-2013, 01:28 PM
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I'm getting 16.5 in a sclb with a 4 inch lift and that's letting it run for 5-10 min in morning before I leave,avg 30 mile trip to work or store.
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Old 03-24-2013, 01:41 PM
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Your mileage is about half of what it should be... I think you have a massive boost leak somewhere.
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7.3 fuel mileage issues

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