I had this issue a couple of times and found that the windshield washer squirt nozzles would leak at the hood nozzle joint and the water would run down the hose and drip off above the coil packs, 3 & 7 on mine. Put some silicone sealer between the nozzle and the hood and didn't have any more problems, until I disturbed the nozzles again, usually in he winter time when I am scraping snow and ice. If I disturb he nozzles and the are putting salt on the roads at that time I will get a coil pack failure within a couple of days. Good luck.