Thread: fighting lean issues.

ok so last week or so i installed my aem a/f wideband. at idle in park the car sits about 14.8-15.9 sometimes goes to 16-17. but usually moves between the 14-15 back and fourth alot. i put it in drive and it sits about 15-17. 1/4 throttle i cant get it above 14.. iv checked the vac lines to make sure i dont have a leak somewhere everything was good. Then i got a maf sensor low circut code. so i checked all the wires found nothing wrong. ended up paying 150 bucks for a new maf today and still no change. the code went away but im still seeing the lean issues. im running out of ideas of what to do or check next!

yes fully warm closed loop i have no idea how to check i only use the aem wideband and a aeroforce. no drivabilty problems. doesnt stutter or stall. it stays in the 15-16 when crusing drops to 17 when i let off.

its supposed to run lean while cruising. what are you reading at WOT?

Desired AFR is 14.7 on a stock vehicle for normal driving. You are seeing very normal readings.

The 17 afr is the decel lean out when you let off the gas.

i see constant low 15's to 17 driving constantly. at wot i dont know. havnt gottn a tune yet and with it being 105* out i have some kr issues. only time i see it in the 14's is the first 10 seconds on a start up it sits at 14.2 then goes to 16-17

its SUPPOSED to run lean when youre cruising. how do you think you get good gas mileage? go WOT and i bet you a billion dollars it at least dips into the low 12s.

oh, ok is it supposed to run lean at idle as well?

yes.

hmm so then it reading 17 and -- sometimes isnt to bad. makes me feel little better lol.