Here is the Problem 350 TBI suddenly a couple of months ago started running funny, No heat out of heater so I replaced the o2 sensor and put in a new fuel filter, do to the lobing it was doing. Not it warms up inside and the motor warms up fine, but after that oil presure drops below 30 then is lobes and dies. this usually happens every morning or every other, It fires right back up but it is anoying as H.E. double hockey sticks.Sometimes when I get to a stoplight it does the same thing. Help what to do? Is this a fuel problem as in pump or a air to fuel mix or my distributer, what!!!???!??!?!?!??!?!