How do i troubleshoot the fuel system of a 2000 volvo S70?

Start by checking the diagnostic trouble codes (DTCs), check fuel pressure and spark to engine. There are many possibilities and this is a complex system that requires old methods (fuel and spark check) and new methods (DTCs). Knowing these cars as I do, they also have a special programmed key to start the car with a microchip in it. The system is called the immobilizer. First try another key, then if it still acts up, I would get a Volvo shop to perform the diagnosis. This requires special tools and knowledge to diagnose and repair. Good luck

Start by checking the diagnostic trouble codes (DTCs), check fuel pressure and spark to engine. There are many possibilities and this is a complex system that requires old methods (fuel and spark check) and new methods (DTCs). Knowing these cars as I do, they also have a special programmed key to start the car with a microchip in it. The system is called the immobilizer. First try another key, then if it still acts up, I would get a Volvo shop to perform the diagnosis. This requires special tools and knowledge to diagnose and repair. Good luck