My Volvo diesel D13 creates boost at low RPM's at various amounts of level and at any given time; the fuel mileage has gone down by 1.5 miles per gallon. The waste gate was replaced and the computer was reprogrammed twice with no improvement. Help please!

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    Thanks for being here! We like to see new people ... can you please clarify exactly what your question is, though? Are you looking for the fix or are you just sore that your fuel mileage is down? I'm not sure how to take this ;-) Do you have any other information? Commented Feb 11, 2016 at 0:01
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    To add to what @ᴘᴀᴜʟsᴛᴇʀ2 is saying. Is there anything else you can add regarding information and what the issue is. Is it the mileage? You don't have a question that is implicitly asked so it leaves things to assumption. Also, can you add the year of the vehicle into your post? Commented Feb 11, 2016 at 2:25
  • When you say your computer was reprogrammed do you mean it was done at a dealer? or was tuned?
    – Ben
    Commented Feb 11, 2016 at 15:07
  • Is it boosting sooner than it did before? A drop is gas mileage could be related to MANY things. What makes you think the boost is responsible?
    – rpmerf
    Commented Feb 12, 2016 at 15:59
  • It is a 2008 Volvo D13 and the reprogramming was done a second time at a dealership because another dealership ha reprogrammed it after replacing the head on it and the second dealership did the programming again as a desperation move to see if it was causing the problem.
    – Brother
    Commented Feb 12, 2016 at 17:39


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