Hi guys,
My car is having a frequent, yet unpredictable stutter coming through the engine/exhaust that has really got me stumped. I am hoping you can provide some feedback before I start replacing parts.
Here's a video clip of the issue
Here's what I know:
1. It happens with the engine both cold and hot
2. It happens in dry weather and wet
3. It seems to mostly happen within 2500-3300RPM
4. It does not happen during heavy or WOT acceleration
5. I've inspected the engine for any loose hoses but haven't found any.
The engine has thrown a code, 2198 which is O2 stuck on rich (
http://www.obd-codes.com/p2198)
However it has also thrown code 2096 which is too lean! (
http://www.obd-codes.com/p2096)
The only modification to the car is an RPi exhaust which I recently installed. And yes, these issues did seem to start around the same time that I switched exhaust. (I also ran the car for about 5 days with no mufflers at all before RPi was installed).
Could it be that I just need so replace O2 sensors?