o2 sensors and exhaust leaks
#1
o2 sensors and exhaust leaks
How sensitive are o2 sensors? I'm working on a 5.3 with MP turbo. My long term fuel trim on bank 2 reads good. Bank 1 is reading 25. I found an exhaust leak and fixed it but it hasn't changed the ltft readings. Just bank 1 is running super rich. Plugs are fouling out and I keep changing them to make sure I don't have a dead cylinder causing my problem. I've changed out new intake gaskets with another set of new gaskets. I'm convinced I do not have a vacuum leak. Could a pin hole in the exhaust be causing a false reading at my bank 1 o2 sensor? I'm not seeing any holes but I'm about to pull my crossover pipe off again and check it out. Would anything else cause this issue?
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