Blakestuhh
I'm Awesome
It might be your fuel pump! Mine was doing the same thing.
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Yeah it sucks! Mine still does it a little, my o2 sensor was good. Where is the pcv valve?
Did you ever figure out your problemdid you ever figure it out?
Mine has been acting up the same way. With the hood open and the air cleaner off, I can hear the TBI sucking air just before the idle shoots back up... yours do that too?
I would take the air cleaner off and take off that collar looking thing off too and look at the injectors, see if they are spraying correctly. If there is any dripping or unevenness to the spray, put a test light on the injector harness to see if you have full voltage to them. If the voltage is low then you should replace the Ignition Control Module as it is responsible for sending voltage to injectors. Maybe even your pickup coil?
Infortunately for me, This didnt work either. I have literally replaced every sensor plug and wire on this thing and nothing has fixed it... sitting at the chevy dealer right now