'94 (L) Volvo 940 turbo estate, 140K miles, cut out 9-10 times in the last few journeys, generally at low speeds and on braking. All dash lights come on, brakes and steering are almost lost but as it has always been at low speed I've been able to halt fairly safely and it restarts immediately. No relation to engine temperature, fuel level, weather, length of journey. All fluid levels seem ok, always uses a lot of oil and there's a small patch of oil underneath when it's parked, front brakes do need attention. Have had a fuel pump relay go on an older 740 but that wasn't related to braking. Daughter's VW Polo has a stepper motor/idle control fault, but that is constant and this is very intermittent. Any ideas would be appreciated.