does secondary O2 effect fuel trim?
Thread Starter
Joined: Jan 2002
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From: canada
does secondary O2 effect fuel trim?
is secondary O2 mainly used to cat effectivness?
or does it have any effect on fuel trim or ignition timing of anysorts.
say i were to install a test pipe that eliminates secondary O2. any ill side effects besides CEL
or does it have any effect on fuel trim or ignition timing of anysorts.
say i were to install a test pipe that eliminates secondary O2. any ill side effects besides CEL
Senior Member
Joined: May 2001
Posts: 10,753
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From: Where snow is, I am.
Re: does secondary O2 effect fuel trim? (Steady)
the primary o2 is what effects fuel trim mainly, the secondary just advises the ecu that the emissions is working properly and that the cat is functioning as well -- doesn't have much else function though.
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