if it was the coil, it could be intermittent
if it was an injector, it also could be intermittent
when it is missing, listen with a screwdriver, vacuum line, stethoscope etc to the injector and see if it is clicking, if it doesnt sound like the rest of the injectors it could be an injector issue
if you feel comfortable enough, when it is missing, unplug the #1 wire and see if you have spark at the plug.
if you have low voltage from the 02 sensor, that would indicate a lean condition, suggesting that you have a fuel related misfire
how are you checking this voltage? if you are checking voltage to the 02 sensor it is for the heater circuit. o2 sensors create their own voltage based on how much oxygen is in the exhaust stream. the max voltage it will produce is 1 volt in an extreme rich condition
2003 F-150 RC/SB 4x4
1978 Fairmont Futura
Originally Posted by StxDangerRanger
You must not know.
the first interior picture Justin usually takes, is one of him cleaning it.