light is flashing.? I had the codes read, it says cylinder 1 and cylinder 3 misfire. I just replaced the spark plugs a couple of months ago and the fuel filter yesterday (non related) any idea what could be causing the problems? In idle its really rough and unless I keep giving it gas it dies, in order to go I have to give it extra gas or we will just kind of jump until everything catches up and at high speeds when I try to speed up it kinda skips and eventually will but it takes awhile.....