code 172 and vac Q.

92redsc

Registered User
two questions, first, my CEL come on and off while i am driving. sometimes more than others. runs good, nearly perfect but is pulling 172 form KOEO. KOER pass. i guess wither the o2 sensor is bad or i really do have a lean condition on that side. but it runs good, what do you think? also my vac is around 16 at idle, and boost is around 11-12 psi under full boost. car idles smooth. do i have a small boost leak somewhere? or do some cars just idle at 16 vac. when im at speed and let completely off the gass it goes down to 19-20 but when i press the clutch it settles back to 16. my car is stock except removed air scilencer. thanks guys.
 
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