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Hi Im David, thanks for visiting the site. I would have the fuel pressure tested due to the fact that she runs it near empty all of the time it could have clogged up the sock on the bottom of the fuel pump with sediments from the bottom of the tank I would also have a back pressure test done to make sure the catalytic converter isnt partially or fully clogged.
just checking in to see how its going
do you still need help? if not it would be nice to let me know. thank you