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I gained enough faith in my truck to use it to pull my snowmobiles to northern Maine yesterday. High temp for the day was 15 deg. total tow weight was approximately 3500 pound (2 sleds in V-nose enclosed tandem axle aluminum SnowPro trailer). Watching the GPH fuel use on the scan gauge showed it to be all over the place even at steady state towing. many times it showed 0.5 GPH with a fuel economy of 2500+ mph. (if only). This would be the case even going up slight inclines on the interstate at 75mph. I checked IPR (injection pressure) it held fairly constant at 65-68. The voltage to the turbo veins held constant at 14v,, boost stayed at about 22. Actual milage (according to the truck which is normally pretty accurate) was under 10mpg (which I think is terrible given the light tow load. Mu question is, is the GPH variance a quick with the scan gauge or might I have something else going on?
I don't know about the scangage, but if you are trying to get good MPG you will need to slow down. Drag increases as a square of speed and along with the drag increase comes an increase in fuel consumption. Towing your trailer, even on level ground, gives a big additional drag component. If you want good fuel economy try 65-70 MPH while not towing, or 60-65 while towing with tow-haul on. You may be surprised how much of a difference it makes... on the other hand maybe just drive how you like and install an oversize fuel tank . Good luck, Russ
P.S. weight impacts economy most during stop and go driving, drag is the biggest factor during steady state cruising.
I don't know about the scangage, but if you are trying to get good MPG you will need to slow down. Drag increases as a square of speed and along with the drag increase comes an increase in fuel consumption. Towing your trailer, even on level ground, gives a big additional drag component. If you want good fuel economy try 65-70 MPH while not towing, or 60-65 while towing with tow-haul on. You may be surprised how much of a difference it makes... on the other hand maybe just drive how you like and install an oversize fuel tank . Good luck, Russ
P.S. weight impacts economy most during stop and go driving, drag is the biggest factor during steady state cruising.
I understand, that's why I stated it was a V- nose (not that its very aerodynamic ). 75 is actually the speed limit in north Maine as well, no that I need to travel that fast but, that was on the way home and I needed to make it to my daughters championship B-Ball game. Regardless, still pretty poor mileage considering my father towed a 12,000 pound 5th wheel from Maine to Alaska and back and averaged just over 13 mpg. That was with a 7.3 PSD.
removed my EGR valve for inspection. It actually looked pretty clean for 105k miles. No moisture so Im thinking my EGR cooler is okay too but will still do the bubble test. I cleaned it, cleaned to port and reassembled.
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. Good luck, Russ
