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Bad O2 on 81 280zx


Phenomenon

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I tried searching for "bad o2" "faulty o2" but i can't find the answers i'm after.

 

Would a bad O2 sensor cause the car to run stupidly rich and bog out?

 

Fuel pressure varies from 30-40psi from idle to wot.

 

I just cannot figure out what this engines issue is and it just started doing this about 2 weeks ago.

 

It's not even driveable right now it bogs so badly.

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