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OBDII vehicles are 96 and newer.. few late 95's had it but it... and OBDII motors use pre post o2's the post o2 is a catylist efficiency moniter.... and pre is for fuel metering... and two of my friends that have the sir1 swap like me have two o2's as well in the manifold.

i recently put a b16 first gen motor in my 90 integra. and the Mil comes on while cruising.. and after high rpm's it does as well.. ive done my research in all data i know how to read the codes as well. and code 11 is not a manufactures code. theres not even a code 11. Alldata states that to...