Category: Volvo 850

Volvo 850 opinions, troubleshooting advice, diagnosis, repairs, scheduled maintenance, tutorials and more… includes the rare and awesome 850 T5-R, 850 R and 850 Platinum sub-models

DIY 1997 Volvo 850 Roll-Over Valve Hose Replacement

The past few times I’ve tried to fill up the gas tank the pump keeps shutting off after just a few seconds, no matter how slow you try to pump in the fuel. It took me a while to finally get the tank full. This is new behavior for this car. As part of the diagnosis, I decided to check out the roll over valve to make sure that it was allowing the vapor from the tank to pass through to the charcoal canister during fueling.