Did you ever figure out what this was? Yeah that was my first thought also and I replaced coil-igniter group, I am still suspicious of the signal generator in the distributor if that doesn't send a signal no spark or so I understand. I am trying to find out if that code 6 couldn't be pointing to that. " My truck has the same code but runs fine most of the time. Occationaly it will die for a sec then keep going... Checked the code and it said 6.. Know one seems to know at the dealer without charging an arm and 2 legs...