still perplexed with this 0130 and 0171 codes. I put a new air filter in today as well. I'm wondering since I didn't have the plumbing tight on the throttle body, and it was sucking in air, in turn adding more fuel?, I might have fouled out the plugs? Is this a possibly on why I'm still getting the codes on this? Would that be my next step, plugs/wire replacement? The Ultra gauge is driving me nuts beeping all the time, but don't want to unplug it because I constantly monitor engine temp.