Lambda sensor

[jossgaa]

Recently I have bought a AEM wideband uego and at idle its reading very lean 17+, on cruising 14, and on boost 12. Could it be a problem with the AEM sensor or something wrong with my enigne? Could the oem lambda sensor cause the engine to run very lean?

[Asad]

was it a new unit??

[Wantaglanz]

the AEM needs to be calibrated?

[jossgaa]

yes the aem is brand new and it does not need to be calibrated. The AEM is not faulty because I have followed this tutorial and resulted that its good.

[jossgaa]

Any idea why on boost its reading fine but on idle it reading very lean?