Hi all,

My 1992 is running an MS3Pro, 640cc Flowforces, and a t3 turbo. I'm having trouble getting the car to maintain its idle when coming down from rpm, like approaching a stop sign. It often stalls and the car needs to be restarted. Sometimes it doesn't stall, but the RPMs still dip to way below where they should be. The idle AFR is also noticeably richer and the idle quality is worse. From what I can tell, this means the car is too rich. Maybe some fuel isn't being burnt and its stifling the engine? I don't think my fuel table is too rich, but I am not experienced at all, still a newb. Could someone look at my tune and the attached logs and see what I could do to remedy this problem?

 

I think you have an air leak. I just found that my BOV was a bit wobbly so i tired some duct tape to make a seal and my idling when pulling to a stop is way better. I had messed with all the other idle setting for a long time and it was likely just a little air bleeding through BOV connection. So find your leak.

 

try disabling your overrun fuel cut.

 

- Your ignition timing is fixed to 10* BTDC, change it to "Use Table".
- Increase overrun fuel cut from minimum 1300 to 1500, and max from 1400 to 1800
- Turn off "Idle Advance", keep "Idle RPM Timing Correction". Tune the timing correction table. Also set the "CLT is Above" option to 0F
- Increase your idle valve frequency to 306Hz

Test these changes and see how that goes.