I just had to replace the front drivers side brake caliper on my 1989 Volvo 240 Sedan, Followed brake bleeding procedures out of Haynes manual, Cannot get a firm pedal,or get air all out after 5 or 6 cycles of bleeding all points,( rear drivers side-then front upper bleeder on drive side and so on in the called for order.Car seems to get a firmer pedal when car not running( but not great) when I start it, forget it - pedal goes right to floor. Also, when I try to bleed system with car running, it stalls out- I imagine from the amount of vacuum being used by booster. I am in the water as far as getting this thing right! Please, anyone that can give some advice I'd greatly appreciate it. Thank You in advance.