Subject vehicle : 1997 Suburban 7.4L (big block) SFI 12k miles Complaint : MIL on and Idles rough. Codes : P0301 stored. Misfire counters : 1 = 1760

2 = 5

3 = 0

4 = 3

5 = 0

6 = 0

7 = 0

8 = 9

Secondary ignition looks good. No miss felt or seen o... Login to read more.