Hey guys! My 98' 4.6 was running fine last week until the starter solenoid went kaput. I replaced that and also took apart and cleaned the throttle body, its EGR ports and the IAC as they had 300,000+ miles worth of gunk in them. As soon as everything was put back in order i started the motor and noticed it cranked much faster than before but also that i dropped 1 or 2 cylinders. I checked all the spark plug wires and the coil packs seem fine but i'm not sure. I just did a tune-up on it around 500 miles ago when we bought it.

 

Is it a misfire or a rough idle?