Have any of you been successful in getting rid of your barking yet? Mine seems to do it about every other start, and could be unrelated but I am also having issue with my ethanol sensor reading correctly. Trying to get rid of the most obvious thing first if it is in fact air in the lines rather than guessing
it could be the return line. it starts with it empty so the reg will allow pressure to build and then once it's at the set psi it dumps the fuel into a empty hose producing that noise. maby a check valve at the tank could help on the return line. the head pressure needed to open the valve should be enuf to keep the line full so that noise won't happen. it sounds like air and liquid interacting