Well, after changing the O2 sensors, I'm still getting a check engine light for Ignition System Misfire codes P0333& P0328 and P0422 for Aux. Emission Controls Main Catalyst
Efficiency Below Threshold Bank 1. Both times the RPM's were at 1720& 1760 under 10% & 12% Load. The only thing I have done to the car is put a Eurosport Cold Air Intake
on it a couple of months ago. B1S2 Fuel Trim is still 99.06% even after I changed the O2 sensors. Anyboby have any ideas, I'm getting really frustrated with this car.
Thanks, Kevin

 

It seems to me that you should be looking at ignition coils and spark plugs and go from there if misfires exist. What plugs are you running? Some of the platinum Bosch plugs have caused misfire codes on some cars.. It could go a long way towards explaining misfire codes, and if the issue is bad enough - maybe fuel trim and cat efficiency issues. Especially if you have raw, or nearly raw fuel going into a cylinder or two. How did you get the codes? If it is from a basic OBDII scanner, here are the references I found:
P0328 Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)
P0333 Knock Sensor 2 Circuit High Input (Bank 2)
P0422 Main Catalyst Efficiency Below Threshold (Bank 1)

- Lynn

 

Lynn, I don't know what kind of plugs are in it yet, it's been raining all day. Hopefully tomarow I'll get a chance. I have an Auto Enginuity scan tool that hooks up to my laptop. I'll check out the plugs and see if I need new ones or not. Hopefully thats all it needs.
Thanks, Kevin

 

The injectors also go bad on these cars throwing the 3 way cat codes.

But look at the plugs and coils first.

 

Thanks guys, I'll look into it.
Kevin