stock ka afr's

[TheOne]

stock(well intake/exhaust) ka, aem uego.

i checked the afr's around, and it seems my car runs ~high 13's to 14's afr between 3000 & 4500rpm.

just wondering is that normal or something weird going with my ecu?

[Ligouri Rd]

It depends on how much load the engine is under. If you are cruising and under light throttle the air/fuel ratio should be locked at 14.7. Even under load 13-14s are normal for an NA KA.

If you really want to scare yourself look at the air/fuel ratio when you decelerate in gear, watch it get as lean as 20...

...also completely normal, the ecu shuts off the injectors when engine braking.