One problem related to fuel pump has been reported for the 1999 Volvo S70. The most recently reported issues are listed below.
The contact owns a 1999 Volvo S70. For a number of months the contact complained to an independent repair shop about the strong smell of gas accumulating overnight in the garage after filling the gas tank to full. The contact was advised it was either the gas cap or the fuel tank. The gas cap was replaced, but there was still no improvement. The contact returned to the repair shop where the problem was identified as failed seals on the metal fuel lines entering and exiting the lid of the fuel pump installed on top of the fuel tank under the trunk. The adhesive or sealant that secured the metal in the line and metal out line to the filters plastic lid had cracked and gas vapors and gasoline leaked out of the cracks. The fuel pump was replaced. The failure and current mileages were 170,750. Updated 03/15/11.