My 96 EX with 305,000+mi seems to be choking on fuel. Anytime I accel or pull the slightest hill, it will chug and sputter like shes not getting fuel, then it feels like it finally gets it..but then sputters a different sputter that seems like shes choking on too much fuel. Runs better cold. Warmer=more frequent missing. Exhaust smells thick, almost sweet.