My best guess on what the original issue was is a vacuum leak on #6 injector or that in cleaning the injectors I dislodged some gunk. That is a little less likely than the vacuum leak. Again I cleaned the O-rings and injector ports with the rail off and greased the o-rings to ease insertion and that's where I believe the leak was sealed. Thinking if this happens again I'll pull the rail and do a seal kit. Make sense? BTW excellent advice on the rail pull, had it out and in hand in 20 minutes.Whoops Looks like i was not clear in my last message. When I said "runs like before" I meant to say the misfire was fixed! And it runs like it always had for the last 30K miles, as if it never had a problem. The only issue is that the CEL is still lit.
Scanner still says it has a misfire on #6 and I can't clear the P 0306 code without it coming back on. I drove it 20 miles and still is lit. Disconnected battery then for 30 minutes and still there. Do I need several warm up cycles for the ECM to clear on its own?
Sorry to have misled you