the wineing is probably the fuel injecters because that is what was wrong with my dads truck.
Lack of info Hesitation causes: Fuel filter, injector/s dirty, ignition problems are places to start
A vibration in the front end of a Volvo S60 while accelerating is due to imbalanced tires. Swap the tires until the right combination is achieved.
Check the gearbox mounting.
It's probably the low windscreen washer water level light. If you keep washing the windscreen, it will eventually stay on until you refill the washer fluid.
Bumps in the road.
Wiring or sender unit in the tank.
Broken valve spring
The engine is not running!
Has recent work been performed?
my odometer on 2002 volvo s-80 does not work
bearing
Check the spark plug cables and spark plugs themselves. I had the same problem about 3 months ago, and it was a bad plug cable and a bad plug as well.