O2 sensors

Whidbey Goblin

Whidbey Goblin

Well-Known Member
On my donor car there were two O2 sensors. One in the exhaust manifold and one in the downpipe. My new header has a port for one 02 sensor but the pipe and muffler DF sent doesn’t have a hole for an O2 sensor. Is this something I need to weld in or do I not use the second O2 sensor?
 

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ATMironov

ATMironov

Well-Known Member
Whidbey Goblin said:
On my donor car there were two O2 sensors. One in the exhaust manifold and one in the downpipe. My new header has a port for one 02 sensor but the pipe and muffler DF sent doesn’t have a hole for an O2 sensor. Is this something I need to weld in or do I not use the second O2 sensor?
Click to expand...
The 2nd O2 sensor monitors the efficiency of the CAT.
Since there is no CAT, no need for the 2nd O2 sensor.
 
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