I have an 01 max Cali spec and I put on a warpspeed ypipe and test pipe. Before I put them on I had a 420 code. Now I have a 420/430 code. I read up on Antifoulers, but I'm not sure witch sensors they would go on? Can anyone direct me really quick I'd be much appreciative

 

Antifoulers go on the secondary o2 sensors.

 

So like bank 1 sensor 2
And bank 2 sensor 2?

 

Since you have both codes, do both O2 sensors.

Did you gut the bank 2 pre-cat?

 

 

They go on the downstream sensors, the ones after where to cats would be. The sensors closer to the engine stay in place as normal.

 

No I haven't gutted it

 

Since you went to the trouble of installing a y-pipe and a test pipe, I feel that it is inconsistent to leave the one pre-cat in place. Bank 2 has more exhaust restriction than bank 1.

My .02

 

You could leave the downstream sensors in place and use an o2 simulator. Cheaper than buying sensors and it has a cool LED blinky light too.


Gut the cat too.

 

http://www.o2spacer.com/