Hello!! Just joined. And before anyone asks YES I did a search inquiry for my issues but couldn’t narrow any info down. Recently purchased a 2006 2500 with a 6.0 and I’m a little concerned. Previously had a 2004 with a 5.3 but wanted something with a bit more susp and snort to pull my fish house which is 4500lbs. This thing feels like a DOG. It has 160k, absolutely flawless condition. Starts up a runs and idles smooth as butter. Last weekend I pulled my fish house 118 miles and it took me 22 gallons of fuel!! 5.4mpg. That can NOT be normal. I didn’t expect teens but WOW I did expect 9-11 as it’s only 4500lbs. It feels as though I need to put the pedal to the floor board to get it to downshift a gear for more power on hills or it loses speed. No codes. No CEL. just asking you guys for ideas as I’m not familiar with the 6.0 but from what I’ve been told this is NOT normal and maybe some issues with fuel trims, O2 sensors, MAF, throttle linkages etc. truck has brand new plugs and wires and brand new manifold gaskets. Any directions I can go? It seems to run smoothly with and without trailer just seems to blow thru fuel at a crazy ass rate. Thanks for any input.
Hello!! Just joined. And before anyone asks YES I did a search inquiry for my issues but couldn’t narrow any info down. Recently purchased a 2006 2500 with a 6.0 and I’m a little concerned. Previously had a 2004 with a 5.3 but wanted something with a bit more susp and snort to pull my fish house which is 4500lbs. This thing feels like a DOG. It has 160k, absolutely flawless condition. Starts up a runs and idles smooth as butter. Last weekend I pulled my fish house 118 miles and it took me 22 gallons of fuel!! 5.4mpg. That can NOT be normal. I didn’t expect teens but WOW I did expect 9-11 as it’s only 4500lbs. It feels as though I need to put the pedal to the floor board to get it to downshift a gear for more power on hills or it loses speed. No codes. No CEL. just asking you guys for ideas as I’m not familiar with the 6.0 but from what I’ve been told this is NOT normal and maybe some issues with fuel trims, O2 sensors, MAF, throttle linkages etc. truck has brand new plugs and wires and brand new manifold gaskets. Any directions I can go? It seems to run smoothly with and without trailer just seems to blow thru fuel at a crazy ass rate. Thanks for any input.