i have 2 tubes the one that was with the car when i bought it. It idled andran fine then with 24 lb injecter and then i bought a tube for 30 lb but there i now colors left on either one?? Does someone with a known 24 or 30 tube give me there measurement size on the flat end. Mine is 1/2" and 9/16" but are these the correct measurements for the 30lb which is in the car now??