Hondata

1993 Civic ex
Kmanager 4.3.2
ecu #37820-PRB-A08 2068-801970

modified 05 k24a2 basemap datalog Kpro V4 purchased last week from KERSIESPARTS. Arrived this week.


1993 civic. k24a type s engine. k20z1 transmission. Ktuned Conversion harness. ID 1000cc injectors. walbro 255. AEM FPR set to 50psi. Ktuned 4-1 header. OEM Denso primary o2/wideband. Wireworx engine harness.

I start the car and get a AFR of 10.7, then after idling for a while it jumps significantly. once it jumps the idle also becomes rough. Tried two different Denso Primary o2s. one was brand new, the other used, both get the same results. Anything i can look into?

The 'jump' is when the o2 actually starts to work. The AFR is not 10.7 - it is quite lean. Given the manifold vacuum is low (52 kPa) and lambda very lean I'd look at tuning it first.