FIREMAN Posted January 27, 2009 Share Posted January 27, 2009 I have a AC 460E motor and can only get between 4.7 and 4.9 MPG. It has 3.73 gears with a 13 speed overdrive. I was wondering what kind of MPG others are getting. I was at the dealer yesterday and had an injector pump replaced because it was throwing an 84 code repeatedly. They put an update in the computer but the readout showed 4.7 over it's life. Am I going to have to live with this or is there something else wrong. Quote Link to comment https://www.bigmacktrucks.com/topic/8131-lousy-fuel-mileage/ Share on other sites More sharing options...
fjh Posted January 28, 2009 Share Posted January 28, 2009 I have a AC 460E motor and can only get between 4.7 and 4.9 MPG. It has 3.73 gears with a 13 speed overdrive. I was wondering what kind of MPG others are getting. I was at the dealer yesterday and had an injector pump replaced because it was throwing an 84 code repeatedly. They put an update in the computer but the readout showed 4.7 over it's life. Am I going to have to live with this or is there something else wrong.How was your idle time? Quote Link to comment https://www.bigmacktrucks.com/topic/8131-lousy-fuel-mileage/#findComment-29953 Share on other sites More sharing options...
FIREMAN Posted January 29, 2009 Author Share Posted January 29, 2009 I have a AC 460E motor and can only get between 4.7 and 4.9 MPG. It has 3.73 gears with a 13 speed overdrive. I was wondering what kind of MPG others are getting. I was at the dealer yesterday and had an injector pump replaced because it was throwing an 84 code repeatedly. They put an update in the computer but the readout showed 4.7 over it's life. Am I going to have to live with this or is there something else wrong.It's no worse than with my old E-7 355. Quote Link to comment https://www.bigmacktrucks.com/topic/8131-lousy-fuel-mileage/#findComment-30018 Share on other sites More sharing options...
Underdog Posted January 31, 2009 Share Posted January 31, 2009 I have a AC 460E motor and can only get between 4.7 and 4.9 MPG. It has 3.73 gears with a 13 speed overdrive. I was wondering what kind of MPG others are getting. I was at the dealer yesterday and had an injector pump replaced because it was throwing an 84 code repeatedly. They put an update in the computer but the readout showed 4.7 over it's life. Am I going to have to live with this or is there something else wrong.I normally get around 6.0 with my pre EGR 427, but I've noticed a drop probably related to winter blended fuel. Down now to about 5.3 on average since December 1. I haven't used enough ULSD or BIO to judge that as a cause. The EGR models I am familiar with can't seem to average more than 5 MPG. Fuel economy is a major focus in marketing the new MP engines because lots of customers are unhappy with the AC E-Techs. Quote Link to comment https://www.bigmacktrucks.com/topic/8131-lousy-fuel-mileage/#findComment-30101 Share on other sites More sharing options...
mackcl96 Posted February 1, 2009 Share Posted February 1, 2009 I have a AC 460E motor and can only get between 4.7 and 4.9 MPG. It has 3.73 gears with a 13 speed overdrive. I was wondering what kind of MPG others are getting. I was at the dealer yesterday and had an injector pump replaced because it was throwing an 84 code repeatedly. They put an update in the computer but the readout showed 4.7 over it's life. Am I going to have to live with this or is there something else wrong.PM, sent................. Quote Thanks for hearing me out.You can have the soap box now---------JIM Link to comment https://www.bigmacktrucks.com/topic/8131-lousy-fuel-mileage/#findComment-30162 Share on other sites More sharing options...
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