What brand O2 sensors ? Universal fit, or direct fit ?
O2 sensor failure can be a faulty heater element, or from running too rich or too lean. A head gasket failure and exposure to steaming coolant can kill a sensor. Some RTV silicone sealants can cause O2 sensor failure. A failed O2 sensor can cause poor gas mileage (1/3 to ½ drop), rough running or idle, stalling and stumbling, with black smoke.
Is your 0331 head cracked ?
Progressive Liberalism: Bringing you new ideas so wonderful, they have to include mandatory participation ......
Originally Posted by Ronald W. Reagan: Government is not the solution to our problem; Government is the problem.