silverTA2002

iTrader: (1)

Is slow o2 switching in only 1 bank a sign of a bad o2, exhaust leak, or some other problem?

I've looked for exhaust leaks and have found none.

The o2 sensors are 3 weeks old. Bosch 13111.

Bank 1 switches quickly between 50 and 800 at idle.

Bank 2 switches about half as fast between 200 and 600.

As a result, my LTFTs on bank 2 are about -4 compared to bank 1.

I'm gonna switch the o2s from one side to another to check if it's a bad o2 already.

But, what would make an o2 go bad in 3 weeks.

I just want to know if there's anything else to check for.

Steel Chicken

iTrader: (3)

an O2 can go bad just by someone rubbing their greasy fingers on it. pull it out, clean it up and put it back in on the other side. (swap)

silverTA2002

iTrader: (1)

I don't have a torch....

Is it safe to use "residue free electronics cleaner" on it?

silverTA2002

iTrader: (1)

Well... it was a bad o2 (or just a slow one)

Hurray for 1 year replacement guarantee! I just brought the old one in, and they handed me a new one. (good thing I kept the receipt)

Very unusual that the sensor would go bad so soon. Or, maybe it was bad to begin with. I looked at a log from 2 days after install and it seemed slow even then.

silverTA2002

iTrader: (1)

Go figure, while I was down there, I found 2 things.

1. A drop of black oil on the bottom of the header where #8 plug meets the head. No oil anywhere else, no drops on the garage floor, no oil on the valve cover... ???

2. My #8 plug boot was so loose I pulled it off with no force. ???

Now the car has smoother power when revving (before, it felt like it "kicked in" at 4k.) And more tq down low.

frack

iTrader: (4)

I would check all plugs on the side you was having trouble. Mine did the same thing and fouled up 2 plugs.

silverTA2002

iTrader: (1)

Hopefully the plugs are fine. I changed them about a month ago.