2011 Peterbilt 389 fuel won’t stay equal

[Volvo8873]

(09-30-2020 )5022 Wrote:  I think when I had my 2013, pete's fix was fittings back into the tanks on the return lines with the orfices reduced. After replacing them I don't remember it being a problem. Dealer had the updated fittings in stock. Hope this helps.

I had this tank equalization problem too with my Volvo when I switched tanks. Turned out I needed the reduced fittings on the return lines which the new ones did not have on the tanks... Swapped them out and no issue since.... still actually has me wondering how that is myself.