ved12 465hp very very low mpg

Discussion in 'Volvo Forum' started by bizzzzzz1, Nov 16, 2013.

  1. Zeeny

    Zeeny Light Load Member

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    Nov 16, 2013
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    Maybe,I forgot,hey positiveone does your Volvo make a ticking noise.i installed a reman d12 and it's got a pretty loud ticking noise Volvo checked the over head and said every them was fine,there was a guy on here that said his and his friends d12 also make that noise,was just wondering if that's something normal with the d12 thanks
     
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  3. bizzzzzz1

    bizzzzzz1 Light Load Member

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    So anybody Can tell me the part# of the turbo by the vin#? Replacing with a bigger turbo helped me on my 12,7 detroit. Dealers usually dont tell ya bcause they knoq u will be looking for smth cheaper.
     
  4. IH Branded

    IH Branded Medium Load Member

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    How much can exhaust leaks cost mpg ? especially ones where there is a soot stain on the block
     
  5. snowwy

    snowwy Road Train Member

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    every 07 i've been around has the worst fuel economy in the history of semi's. i've only heard of one that actually hits 6. and he has a cat in his pete. inframed for 500 horse.

    my first OTR company coming back on the road. bought 4 FL's. with detroits. they won't even hit 4.
     
  6. TheEnglishMan

    TheEnglishMan Light Load Member

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    Test CAC, have the overhead run by someone who knows what they are doing, put the correct volvo fuel filters on, plug the egr cross over pipe and then see where your at. If you have 3.42 or 3.36 rears your screwed. This was a really bad spec and does nothing but hurt mpg. I just went 160 miles empty and got 9 mpg at 60 mph.
     
  7. TheEnglishMan

    TheEnglishMan Light Load Member

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    Oct 3, 2012
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    Also, check you don't have leaks around the outlet of the turbo to the intake manifold to the CAC. There are o rings there and you will get blow by if they don't seal probably.
     
  8. bizzzzzz1

    bizzzzzz1 Light Load Member

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    Jan 1, 2013
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    what is the best rpms range for better mpg on this kind of engine? i know every engine should be driven different. As for example my old detroit i always shift at low rpms, never going over 15. I heard from others Cummins is the revers, between 15 and 16.
    Maybe i do it wrong(have doubts about this ). And i got 3.55 rear with low pro 22.5 on this volvo
     
    Last edited: Nov 17, 2013
  9. bizzzzzz1

    bizzzzzz1 Light Load Member

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    When saying plug the egr cross over pipe, what do u mean by that? My egr is not deleted if this is what you thought. If no, please explain a bit if u can, some more details. I know where and how they look like.
     
  10. bizzzzzz1

    bizzzzzz1 Light Load Member

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    what is the fuel pressure for these engines? at idle now i just noticed that once 1-2 minutes the rpms go down for a second and back to normal. I have so many questions and nobody answers....
     
  11. tirexpress

    tirexpress Light Load Member

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    Jul 31, 2012
    Montreal, QC
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    I was about to say that ...
     
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