1999 Chevy Malibu

P0300 Random misfires-normally caused by vacuum leaks and contaminated fuel.

A P0301 and P0302 is a misfire on cyl no.1 and no.2

Engine misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel