Car was a 1998 Oldsmobile regency
How To Fix P0300 random misfire codes in your car
I replaced the : map sensor, cables, spark plugs, fuel filter, coil pack, and cleaned the EGR valve.
I used the spark tester to test the coils and the 1 and 4 cylinder wasn't sparking enough to have the car run properly. After I replaced the coil the car ran like new. Thanks for watching hope I could help.
