1989 NISSAN 300ZX Engine Problems

I AM THE OWNER OF A 1989 300ZX THAT I PURCHASED USED IN 2013. THE CAR HAS APPROXIMATELY 160,000 MILES ON IT. APPROXIMATELY 6 WEEKS AGO, I NOTICED A FUEL ODOR AND AFTER DOING SOME RESEARCH DETERMINED THERE WAS A RECALL ON THE VEHICLE IN 1996 FOR DEFECTIVE FUEL INJECTORS. THAT RECALL IS ATTACHED, I ALSO HAVE COPIES OF THE TSBS (10 DOCUMENTS TOTAL). A FEW DAYS AFTER NOTICING THE FUEL SMELL (WHICH I COULD NOT LOCATE THE SOURCE) THE CAR SUDDENLY DEVELOPED A FUEL RICH CONDITION AND THE ENGINE BEGAN TO IDLE POORLY. FOR BACKGROUND, THE CAR WAS RUNNING FINE AND AFTER LEAVING A RESTAURANT, THE ISSUE APPEARED SUDDENLY. I CONTACTED NISSAN AND THEY TELL ME THEY HAVE NO RECORD OF THE RECALL OR ANY REPAIRS TO THE VEHICLE. I TOOK IT TO MY LOCAL DEALER (DICK SMITH IN COLUMBIA SC) AND THEY TELL ME THE SAME. THEIR DIAGNOSIS...