Strange Misfire
Strange Misfire I recently took my 97 SS to the dyno and detected a misfire due to the dyno and the dyno software. The tuner told it was related to the optispark due to old age the wear and tear. Also cause the 02 sensors were not functioning correctly. So I recently purchased new opti new NGK TR55 plugs gapped .045,msd super conductor wires, msd blaster coil,caspers o2 extensions,and new 02 sensors. I got it started and it and it has a miss around 1300 thru 1900 rpm's I don't if it was because the pcm was played with the first time I took it to get it tuned. I have ported heads and ported lt1 intake with XE 503 cam with 1.6 rr. Any help would be greatly appreciated.
