Hondata

Well, here's the situation. Every time i come to a stop light or whenever I even rev up a bit. The idle will hang at around 1500-1600 then drop to the 500-600 range...sounds pretty nasty too. I have attached the calibration and datalog showing this.

Recommendations anyone?

What has been done to the vehicle. We need more details.

sorry about that. Here is a list of mods:

RSX Base model
K20a2 swap
Crower stage 2 3/4 race cams
PRC IM
Hondata IMG
Kpro
AEM CAI
Comptech RH
Toda Exhaust

I recently swapped out my TB b/c my TPS was ghetto installed. This was done around September of last year.

Either the o2 is mis-reading or it badly needs tuning - the AF is going from 22.5:1 to 11.5:1 and the short term trim is going from +15% to -20%.

now you're talking about idle tuning correct? I am going to try and do that today. I'm not 100% sure, but I don't think it's the O2 sensor. I believe I have a spare that I can swap in to check.

doug,

could a bad O2 sensor also attribute to knocking with normal driving as well? meaning could it affect both my idle and driving?

No, not just idling. All the fuel tables need tuning. They are a long way out (~20%).

well, i will replace the o2 sensor and see what happens, if that fixes it then cool if not then it's on to some tuning this weekend. thanks doug