You might want to check recalls for the 2000 Hyundai Elantra. You can either google "2000 Hyundai Elantra recalls" or go to the AAA website where they are posted. I'm surprised they didn't mention it when you contacted them. This is the exact recall listing for the 2000 Elantra: "VEHICLE DESCRIPTION: SOME SONATA VEHICLES EQUIPPED WITH 2.5 LITER V-6 ENGINES AND ALL ELANTRA MODEL VEHICLES MAY HAVE EXPERIENCED INTERMITTENT LOW-SPEED ENGINE STALLING, WHICH COULD OCCUR IF THE MAF (MASS AIR FLOW) SENSOR ELECTRICAL SIGNAL IS INTERRUPTED AS A RESULT OF ENGINE VIBRATION TRANSMITTED TO THE MAF SENSOR CONNECTOR WIRING HARNESS.... Consequence: THIS CONDITION CAN CAUSE THE ENGINE TO STALL, INCREASING THE RISK OF A CRASH.... Remedy: DEALERS WILL RE-ROUTE THE MAF SENSOR CONNECTOR WIRING HARNESS".
I hope this solves your problem... and that it's not too late.