Ed Blown Vert

iTrader: (2)

Ok, since I took out my cats. Just after I start the engine (warm), bank 2 LTFT's hits +20 which is real lean. The car runs rough for a few minutes, then the LTFT's slowly drop to - 2 to -5 and then runs fine.

I have not taken the rear O2's out yet. (gotta get the plugs for the bungs.) And they are still plugged in (didn't want the wires to hang). But codes have been removed with EDIT.

Any idea what is causing this? Is it cause they are plugged in?

Richard@WCCH

iTrader: (3)

Sounds like the bank 2 front O2 sensor isn't heating up fast enough. Are you getting any codes?

Richard

ChrisB

Yep, I would agree with Richard above. You might try swapping the O2's to the other side -if the problem follows the o2 it's time to replace it.

Ed Blown Vert

iTrader: (2)

No codes at all. It didn't start until I removed the Cats. I will swap the O2's and see.

Could it be my AIR? Its still hooked up, but will be blocking the tubes off today.

Bink

If it was AIR it would be both sides, assuming it's functioning correctly. AIR was my 1st thought, also.
joel

Ed Blown Vert

iTrader: (2)

Well, since I didn't know I had to do the restrictor mod. I guess one of the valves could have burned up. Causing one side to work.

Ed Blown Vert

iTrader: (2)

Quote:

Originally Posted by binksz06

If it was AIR it would be both sides, assuming it's functioning correctly. AIR was my 1st thought, also.

The AIR is out and it just did it again tonight.
Guess I will swap the O2 sensors. Can I use the rears??

WicketMike

iTrader: (13)

when your driving it around does it stay fine? or does it jump up to +20 when you let off the gas and cruise?

WS6FirebirdTA00

iTrader: (33)

could it be an o2 sensor going bad??

Ed Blown Vert

iTrader: (2)

When I drive, they are fine. They stay negative. Even more when I let up.

It only happens when I let the engine cool for a little while. Before closed loop. And only for a few seconds.