Can I drive w/o secondary 02s?

[Modern 3kGT]

Can you drive without the secondary 02 senors installed? I have a place to be in a couple of hours and both secondary sensors have not arrived yet. I know they are only there to check an see if the cats are working...

Is it safe?

Thanks, John

[RL7]

You can drive with no O2s. Check engine light may come on and car will run richer than normal. Perfectly safe though.

[dpartinvr4]

it will sound weird with nothing plugging the holes.

[VR-4 0wnz j00]

Lol, it will be loud but manageable.

[mb3000]

You could put a bolt in there if it's that big of a problem.

[x2xtreme360]

You can drive with no O2s. Check engine light may come on and car will run richer than normal. Perfectly safe though.

Secondaries are for emissions purposes only. They have nothing to do with adjusting AFR's.

[J_Parker]

Yep, you can even run on one primary. Just as long as both banks are feeding it.

[n2nsanity]

Yep, you can even run on one primary. Just as long as both banks are feeding it.

can you elaborate on this? i actually have a problem with this
my car is ca spec, but my engine isn't. it had an o2 sensor on the front manifold, but the ones i'm using now don't.
what can i do about this?

[x2xtreme360]

can you elaborate on this? i actually have a problem with this
my car is ca spec, but my engine isn't. it had an o2 sensor on the front manifold, but the ones i'm using now don't.
what can i do about this?

The ECU might send the car into limp mode, although I'm not sure if our ECU's will do that. The one O2 would have to run in open loop if the O2 sensor is unplugged.

You could either grab a fed spec ECU that uses the single O2 sensor or possibly splice the front O2 sensor into the rear O2 sensor, that way the ECU will at least get a signal from both sources.

[J_Parker]

You'll have to splice them together, yes. If you can find yourself a bung and relocate it to about 8 or more inches from where the rear bank plumbs in.