a/f ratio 17-18 at idle?

[potato]

I just installed a new fuel pressure regulator, set it to 38psi (stock turbo/everything sr20det) and now my aem a/f ratio gauge is giving me ---- or 17-18 at idle. the only other thing i did was install a new boost gauge and used the same 12v source and ground. any ideas why suddenly i would be running so lean?

[rwtf]

its idle, who cares.

[pete240]

Have you verified that your base pressure without vacuum is 43?

[potato]

Have you verified that your base pressure without vacuum is 43?

i set it to 43 and then plugged in the vacuum line dropping it to around 35 i think, then i manually raised it to 38 with the vacuum line on. ive raised it to 43 with the vacuum line on now.