Vacuum leak..most likely. Intake gasket or bad hoses..try the starter fluid trick while running to see if it smooths out.
Thanks for the reply. Going to do that tonight except with propane. Also will check vacuum with guage.
Vacuum guage holds steady at 21. I held 2000rpms and vacuum didn't drop off at all so I'm guessing its not clogged cats
Also noticed long term fuel trim 1 is 15% and 2 is 25%. Short term 1 stays close to zero but short term 2 is around 15.
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