header leak question
#1
header leak question
Recently got hooker long tubes installed and at the same time 02 and extensions..after this my check engine light came on..i have a leak i believe on the passenger side on headers and just need a new gasket..my codes got scanned and it came up that one of the 02's was leaning out..at idol it was now getting enough and at higher rpms it was a little bit better..clynders 4 and 7 were also missfiring at times..would this probably be from a leak in one of the headers? thanks alot
#4
Both an exhaust leak before the O2 sensor, and misfires will cause the O2 content in the exhaust to rise, and the O2 sensor will report a "false" lean condition. The result is the PCM richening up the mixture, and now the entire bank is running rich. Fix the exhaust leak. Track down the misfire - plug could have cracked when being installed, gap might be wrong, wires could be burned, wire (or terminal on plug) could be loose..... lot's of things.
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