I had been throwing a misfire code and had been told by the dealership it may be nothing. My car has 100k on it so I decided I should replace the spark plugs and IACV gasket. On my way to do this my car shut off. I was in 4th gear and lost complete power, it will start but only for a split second before shutting back down. The IACV valve looks clean and my fuses are ok. I can also hear my fuel pump buzzing when the car is in the ON position so I figured that was fine.. Still have not replaced the spark plugs but figured that wouldnt fix it. I have no idea what is going on. Any ideas?