Tired guy
Newbie
I have a 96 suburban with a 7.4 vortec. I can not figure out this random misfire. I originally had an alternator issue (140 amp) replaced it with 2 remains and a brand new one (still an issue from time to time) but it started missing. I checked all grounds everything is tight. So far I have replaced plugs wires cap rotor cam sensor crank sensor fuel pump and filter ignition module and coil. Set my timing with a snap on scanner. At a loss at this point. Any help would be appreciated thank you