getting cel 2187. I have gine threw and tightened eveything. Found my recirc tube was a little worn and cracked(new one should be here in the next couple days). My afr cmd at idle is 13.9-14.6, and the act afr has been anywhere from 14.6 to 17.3. could me recirc tube really cause that much of a floctuation? Also a 0455 cel just came up tonight. Could this also cause the 2187 or could the 2187 cause the 0455? i know they are 2 different systems but just a thought. What do you guys think?