i have checked the exhaust back pressure tube, it is open. i also checked with a volt ohm meter between the three post on the sensor, i got a reading of 634 ohms between the two front post, and ( 0 ) between either front post and the single rear post. after cleaniing the sensor and reinstalling it it now reads 1670 ohms between either of the contacts, it just flashes this and goes out, i have another truck and i checked it and it reacts the same, by flashing this ohms value 1690 to 1705. does any one know how to test these, or is this reaction correct thanks in advance. MHP

 

I've seen anywhere from 13-17 mpg with mixed city/highway driving. I'm fixin to go on an 1100 mile, all highway trip on Sunday, so I'll get to see for sure!

 

I just finished my rear fuel tank and got 355 miles out of it. I still have to drive to the gas station so I'll get a little more.

 

Once all the bugs got worked out of it my mpg jumped... 60-65mph from WV to NC and got 22mpg usually see 16-18 city...Hypertech tuner on high.
----------------------Jeremy

 

I just got 250 on my rear tank (pushing it). How can I get an extra "Franklin" out of it?

 

What do you mean you were "pushing it" ? If you have fuel in the front tank, you can run the rear untill it's empty. The needle on the gage goes way below the red line before the tank is empty.
Although I don't run the tanks empty very often, I have run them both DRY just to see how far the gage would go before it quit.

 

hey 60man where at in va do u live???

 

Just got back from my 1100 mile trip. I got 16 mpg on the way down, running the AC and 75mph. I went and picked up a hard tonneau cover and with the cover, no AC and running 72mph I got a little over 18 mpg and got 330 miles on the rear tank alone.

 

running a tonneau cover should have had the opposite efect. Anything that covers the bed of a truck effects the aerodynamic pocket that builds ffrom the side of the bed walls just behind the cab. If you ad anything over the rails you essentially load the rear of the truck more (unless you have a craftsman truck series vehicle for a daily driver). That must have been with a tailwind. If you take two trucks IDENTICAL and compare with and without covers, the one without should avg 6 10ths better at highway speed. But the cover does look a lot better....LOL Just some info that I thought I would share.

 

Weird. I have always thought that it would give you better fuel mileage with a tonneau cover. Oh well, if I was worried about getting really good fuel mileage, I wouldn't own my truck!

 

I agree a honda hybrid or some other rice burner that usually sucks diesel smoke. LOL

 

it was on mythbusters, without the cover the air would create a bubble behind the cab till the tailgate and the air would just zip over, with the cover there is no bubble and the air just bounces off your cover

 

There was a short story in one of the Diesel Power mags that stated a college did a wind tunnel test to try and prove advertising wrong or right. What they found was that a trucks tested had less drag coefficent w tonneauo cover and sum had as much as 8-10% lower. I don't know less drag more MPG. I had one on an extended cab short bed it helped about 2-4tenths.Afrien of mine has 03 CC V10 4x4 LB w/cover on interstate cruise on68 16MPG.

 

I don't know if it makes a difference or not, but I have a cab-high aluminum camper shell on my truck. I get about 16 mpg with the shell in place. Before I put on the shell, I was getting 15 - 15.5 mpg.

Not very scientific, but I get better mpg WITH the bed covered.

On the mythbusters issue, I was under the impression that the tailgate acted like a parachute, CAUSING the bubble that the air flowed over. I understood it to be a trade-off. Covering the bed was aerodynamically better than not covering the bed.

 

The tailgate is a drag.
Anyone saying anything else is just plain wrong/misinformed.