On my BRC kit there is a OBD connection near the pressure regulator which the fitter used to access the pressure live data with his laptop. By turning a screw on the pressure regulator and viewing the live data he was able to vary the pressure which in turn affects the running and the point at which the system switches over from Petrol to LPG. The pressure regulator contains a rubber gasket/diaphragm which is prone to wear and could have failed after the 'service' causing your problems.
As yours is a Volvo factory install it may well need a trip to the dealer to carry out this adjustment and remove any error codes.
__________________
1999 V40 T4
|