89 gmc lean running condition

[Jordenw]

Thank you for all your great info guy’s, but I finally got it figured after weeks of hair pulling and head scratching it turned out that the place I bought the truck from had used a front end loader with forks to move the truck around their yard and had bent the bottom of the fuel tank so it was making contact with the pump inlet and squashed the strainer causing a fuel restriction. Could have saved a lot of messing around if I had only took the tank out of its shield, but lesson learned
Won’t be over looking that ever again, lol.