No power. Poor fuel economy.

It came with a 10 speed manaul. I swapped in a similar ratio 13 speed to gain the splits.

 

No it didn't affect it at all it just recently got crappy

 

Stop my shifting habits because it just recently lost 3 miles per gallon lifetime fuel efficiency of this truck with me driving it has been 7.9. It just had to be serviced done 2 weeks ago and the driver side fuel tank drains faster than the passenger side tank

 

Oh and over the weekend I had the engine smoke tested to check for leaks I can hear something that sounds like a leak coming from the EGR side but it doesn't come up during the smoke test because they waited until the engine is cold but when the engine is hot when I lose power

 

I have replaced those vent filters in the past 6 months. I said to hell with them this weekend and just unplugged them. Next step is replace the fuel lines. Volvo in Nashville thinks I might need to replace the fuel filter assembly on the driver side with the spin on since I have 656k miles on the original. The truck is on its 9th set of injectors.