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Thread: Less mpg!!! I'm sure lol...

  1. #1
    Regular Member darrenmac's Avatar
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    Vehicle : 2.0 Turbo

    Trim : SRi

    Engine : 2.0 T

    Year : 2008

    Mileage : Low

    Default Less mpg!!! I'm sure lol...

    I have just come home from work, I use my 150bhp cdti veccy as my taxi/private hire..
    I fitted a dtuk red box yesterday morning which I bought off a forum member..
    Very pleased with the performance increase but how people think these increase Mpg I don't know..
    Maybe just me, it maybe be because not filled the car up and gauged acuretley yet..
    Just seemed to use more than usual, would not mind if I was flying around all the while..
    Is this normal?
    Cheers
    Darren

  2. #2
    Regular Member Grumpy1954's Avatar
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    Vehicle : Ford Kuga

    Trim : Titanium

    Engine : 2.0dtci

    Year : 2014

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    I don't have one of these, and don't intend to. If I do anything it will be a remap. However, I have trouble seeing how a device that fools the engine into over fuelling can improve consumption. Like I said, may be talking through my backside, just my view.

  3. #3
    Regular Member byebyeitsagsi's Avatar
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    I have the same opinion on them as grumpy.

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    Regular Member darrenmac's Avatar
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    Vehicle : 2.0 Turbo

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    I tend to agree with you both at the mo!!
    Like I say performance is great, but does not save fuel!!!
    Glad I did not buy a brand new one would of been sick as a pig...
    Cheers
    Darren

  5. #5
    VIP-Member happypostie's Avatar
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    Vehicle : insignia vxr

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    ive got a remap on mine . and it gives better mpg ,as long as your not got a lead foot all the time . i think if im not wrong the remap works with the ecu working out the correct fuelling. but the tuning box seems to just put more fuel in all the time . khalid

    the vectra has gone , but not far away so ill still see it form time to time

  6. #6
    Regular Member darrenmac's Avatar
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    Vehicle : 2.0 Turbo

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    I think your right Khalid I also think people read and rely on their fuel computer instead of working out the old way of filling up doing some miles and working it back again..
    I was before this fitted getting 45-47mpg regular..
    Going to fill up soon and see what I get now!!!
    Cheers Darren

  7. #7
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    Quote Originally Posted by happypostie View Post
    ive got a remap on mine . and it gives better mpg ,as long as your not got a lead foot all the time . i think if im not wrong the remap works with the ecu working out the correct fuelling. but the tuning box seems to just put more fuel in all the time . khalid
    what mpg do you get with the remap mate im getting around 50/51 keeping it within the speedlimit without a remap just wondering if it would pay me to get one

  8. #8
    VIP-Member happypostie's Avatar
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    Vehicle : insignia vxr

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    Quote Originally Posted by tyler boy View Post
    what mpg do you get with the remap mate im getting around 50/51 keeping it within the speedlimit without a remap just wondering if it would pay me to get one
    when i had the first remap done i was getting mid 40,s and mid 50,s when on the motorway , now had it remapped again more power this time ,and seems to be about the same . im happy with it the car drives so much better ,no flat spots , smother running . khalid

    the vectra has gone , but not far away so ill still see it form time to time

  9. #9
    Regular Member Hideous's Avatar
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    of course you get less mpg with tuning box --if you use the extra power. only way you get more power is by adding more fuel. some of the more advanced tuning boxes will alter the fueling according to how you drive.
    my CDTI is largely unaffected with a dtuk spider box on, as i don't rev it hard much.
    remaps are similar as far as mpg goes - hardly any difference in economy unless you "cane it" regularly -- then it'll obviously be thirstier than ever.

  10. #10
    Regular Member bangty 1's Avatar
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    dtuk box = extra fuel pumped in the the engine all the time i found with my green box............lots of power tho lol

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