1990 Ford F-150 Q&A

1990 Ford F-150 Question: Air Pump

My air pump bound up, and I got the pulley to turn again.I put some transmission oil in the pump and it smoked for awhile, but it turns free now.But my engine light keeps coming on saying oxygen sensor.I replaced the oxygen sensor 3 times now but the light still comes on saying oxygen sensor.What could be the problem?Does the air pump have anything to do with the oxygen sensor? -
Answer 1
The air pump needs to be repaired it is going to seize, A1Cardone will overhaul yuors or they are probably relative cheap from a local source or www.rockauto.com or Napa. The Os sensor should not need to be replaced so frequently, they are pretty reliable. Things that kill an O2 sensor are silicon, antifreeze or oil contamination or leaded fuel. I forget if it is that model Ford but some Fords allow oil to drip onto the oil sensor itself at every oil filter change. The O2 sensor must "breath" where the wires go into the top of the metal part of the sensor for the sensor to operate properly. Air pump and O2 sensor problem are not really related. Has your truck more than one O2 sensor? Are you replacing the right sensor. They are frequently designated B1S1, B1S2, B1S2, B2S2 is the truck has four sensors. Bank 1 Sensor one is the cylinder with number 1 cylinder and refers to the front sensor. -
Comment 1
No the truck has only 1 O2 sensor on the passenger side.I did see some anti freeze dripping on the wires going to the sensor. -
Related Items:
Truck is making noise and had it looked at by a guy at a muffler shop and he said it was the "air pump" - before I take it anywhere else I was trying to find prices on air pumps but cannot find an...
air pump locked up. can i by-pass if so belt # for serpentine belt that will work
Fuel not making it to the injectors, pumps seem to sound like they're working. What are the odds of sensor/electrical problem compared to something mechanical such as the fuel filter or pressure re...
I hold down the pedal then it starts.Whats the problem? I've changed filter, egr valve , couple coils, throttle position sensor, fuel pressure regulator, plugs, air intake sensor, had the throttle ...
Heater blowing only cold air never warms up