1GA idles lean(16-17 afr) while in open loop. ??

[DSMTyson]

Alright, for some reason my car idles at 16-17:1 afr( it may go higher or lower, but thats where it usually stays most of the time).

Is that normal? I thought it was supposed to stay around 15:1. Or could my car just be different ?

Anyone else have an experience like mine

 

[RadDsm]

Have you verified no exhaust leaks?
That will skew the reading.

 

[DSMTyson]

There is 1 very tiny exhaust leak, but the thing is i can hear the engine start to miss when it gets very high(sometimes my wb will go all the way up to 18:1 on a warm start)

Could a leak that small really effect it that much? I mean the leak is about as big around as this ----> 0

I fixed the little exhaust leak, and its doing the same thing. Gradually getting worse.

Now it stays between 17:1 and past 18:1

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well, i decided to simulate the narrowband o2 through my wideband, and everything is back to normal.