Quote:
Originally Posted by shadrach74
How does the ECU read an exhaust leak aft of the post cat O2 sensor? It seems to me that anything from that point back makes no difference to the ECU. If id does,please help me understand how leaky bypass pipes cause idling issues?
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The ECU reads that the engine is running lean beyond the ECU's capability to compenstate. Exhaust leaks is 1 of many possible causes.
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