Horrid fuel mileage
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Horrid fuel mileage
Hey guys I'm curious as to what to look for behind the cause of my horrible fuel milage. I have an 02 7.3 170k auto. Stock tires and height. Doesn't seem to have any boost leaks and has a chip intake and exhaust. I'm getting like 11-12 mixed Highway and city. Mostly Highway as I travel about 40 miles round trip per day. I'm not sure what else to check for, any ideas. Help appreciated!
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The tire pressures on your door are what the truck was designed around, not only for stability, but for tire wear also. If you rotate your tires regularly, then they will wear evenly unless there is some other issue. The EBP sensor is on the front of the engine, towards the top kind of to the right side of the engine. The tube is below that going to the manifold. A lot of us use and old speedo cable in a drill to clean out the tube with some brake cleaner. Letting the sensor soak in carb cleaner overnight then hitting it with a soft blast of air in the morning cleans them up, as they get clogged too. If you have any oil film around any of your intercooler boots, then you have a boost leak. if you see streaking in the film, then it is a bigger leak. Exhaust leaks behind the turbo at the "babies butt" will leave soot on your firewall indicating an exhaust leak there.
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How are you getting those MPG numbers? If it's from the overhead instead of hand-calculating - the overhead lies, then a chip makes it tell titanic tales.
Soot is bad on a stock truck. Soot out the back says you're lacking air or the fueling is getting carried away - this could be a boost/exhaust leak, or something as simple as a bad ICP sensor. Exhaust leaks reveal themselves in the form of soot under the hood somewhere - soot doesn't belong there under any circumstances.
Soot is bad on a stock truck. Soot out the back says you're lacking air or the fueling is getting carried away - this could be a boost/exhaust leak, or something as simple as a bad ICP sensor. Exhaust leaks reveal themselves in the form of soot under the hood somewhere - soot doesn't belong there under any circumstances.
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Exhaust Back Pressure Sensor (EBPS)
Manifold Absolute Pressure (MAP)
Barometric Pressure (BARO)
On a cold engine, with the Key on the on position and the Engine not running.....the 3 sensors should be within .2-.4 PSI of each other.
so, if you are at an elevation of 1,000 ft above sea level the sensors should all read about 14.2 psi (+ or - .2 psi). If you are around 3,000 feet the sensors should read around 13.2 psi (+ or - .2 psi).
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