On 1990-93 models, Volvo uses three types of fuel systems - Bosch LH-Jetronic, Bendix Regina, and Bosch Motronic.
"[Bendix ] Regina and post-1994 cars have only one pump". (my info source is http://www.brickboard.com/FAQ/700-900/FuelSystem.htm#FuelPumpandFIRelayDiagnosticTests)
In the Regina case, that single pump is located in the fuel tank.
Go to Pdftown.com to download a service manual for your car.
Fuel pump is in the fuel tank, the filter, if fitted, is in-line, usually a grey cylinder in the engine compartment.
on my 92 745..one is in the gas tank, the main pump is under the car around where the armrest is
Mounted on top and inside the fuel tank.
Pull the panel down under the glove box and then look toward the firewall. You will see them there. It is very unusual for one to fail on a CI car such as the 81. Fuel pumps are more suspect as the problem
in the fuel tank it is part of the pump you have to turn and click it in.
the fuel filter is located under the car, about even with space between the front and back doors. It is covered by a metal plate that is about 10 inches by 10 inches. bob
two one in each fuel tank
The fuel tank on a 1990 Volvo 740 wagon has a capacity of approximately 15.8 gallons. This allows for a reasonable driving range, depending on the vehicle's fuel efficiency. Always refer to the owner's manual for specific details and variations based on the model.
One fuel pump for each tank
If it is a regina fuel system it has just one pump
The 1988 Volvo 240 GL has two fuel pumps: a primary pump located inside the fuel tank and a secondary pump located outside the tank. The in-tank pump is responsible for drawing fuel from the tank, while the external pump helps deliver it to the engine.