Bad mpg

[toad]

My fuel milage has really dropped of lately. The truck is 4 wheel drive, 4.10 gears, auto trans, stock other than exhust. I read somthing about leaky injectors at one point and I am kind of wondering if that is an issue? The last time I checked it I was down to 12 mpg. I was pulling about 5000 lbs. Empty I am only 13 ish I used to get about 18 empty

[DA BUS]

Originally Posted by toad

My fuel milage has really dropped of lately. The truck is 4 wheel drive, 4.10 gears, auto trans, stock other than exhust. I read somthing about leaky injectors at one point and I am kind of wondering if that is an issue? The last time I checked it I was down to 12 mpg. I was pulling about 5000 lbs. Empty I am only 13 ish I used to get about 18 empty

Our local fuel has been crap on and off so maybe that's part of it?

Are you buying fuel from another station now?

Driving a little heavier with the foot?

Is this since you put in the 4.10's?

[toad]

Stock 4.10's. I try to keep it just under 70 mph. rpms @ 2200. I don't think my driving style has changed. I have always had a lead foot. I have stayed with the same fuel and I put in some Lucas fuel stuff every tank.

[Gruss]

How old is the air/fuel filters?

[toad]

Fuel filter is brand new. Air is ok

[tneibling]

You might check your boost fittings and make sure all the clamps are tight. My dad's NBS 7.3 normally gets around 18 and suddenly it went down drastically and I checked the boost fittings and one was loose. After tightening it up his mpg's are back up again. Just a thought.

[toad]

I'll ck that tonight. I just bought the 3367 air filter so I can do my own intake tonight.

[ridiculously_necessary]

yeah, stright pipe it too. and 18 is great for 4.10's, i would love 18. but yes 13 is bad