I just got a JDM B16a swap from jdmsource. I could tell the ecu was not a virgin. Looked inside and to my surprise. What looks to be an authentic Spoon Sport chip sitting there. I think it could be making my car run a little rich. At idle the rpms fluxuate a little. Not alot just a little 100-150 idle bounce, slow and not really pattern like. You can also smell fuel. Could it be a vacuum line? What should I do?