Very weird idle issue

EvaUnit01 · Post by **EvaUnit01** » Wed Jul 25, 2007 10:29 am

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?

Post by **Spunkster** » Wed Jul 25, 2007 3:12 pm

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

EvaUnit01 · Post by **EvaUnit01** » Thu Jul 26, 2007 6:53 am

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.

Post by **Hondata** » Thu Jul 26, 2007 8:43 am

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%.

EvaUnit01 · Post by **EvaUnit01** » Thu Jul 26, 2007 8:49 am

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.

EvaUnit01 · Post by **EvaUnit01** » Thu Jul 26, 2007 10:49 am

doug,

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

Post by **Hondata** » Fri Jul 27, 2007 8:34 am

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

EvaUnit01 · Post by **EvaUnit01** » Fri Jul 27, 2007 8:50 am

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