1998 Acura Integra Codes PO170 Fuel trim malfunction and PO

I purchase the vehicle used, after 2 weeks heard a noise didn't sound good, took to a shop, mechanic replaced the camshaft on exhaust side of engine and the distributor. I drove for a while with no noise or problems, now check engine light comes on and the engine seems like it's hesitating at idle and when you get on the gas to shift it stutters, like it's choking on fuel. I took car to schucks and had them read the code with at OBD2 scan tool and the codes refrenced above are what the tool read as codes for the check enigine light. I'm not sure how I can diagnose the problem. I called honda and they told me to go to Acura Dealership and let them find the problem with there fancy computer equip. Otherwise he said if I start replacing sensors etc. It's gonna be even more expensive than just having Acura look at it. Please help if you may have any Idea what could be causing my problem. Thanks so much. Kevin