Hi all, I am still a newbie but have been lurking and soaking up all the information I can about my new truck. I purchased this thing about a month ago and love it...until now. I have been going through and doing all the fluids and filter changes....the typical preventive maintenance stuff. I just installed an Edge CS Evolution to keep an eye on the ECT/EOT temps, FICM voltage, etc. that seem to be the indicator of what to expect from these engines. All was going well, until I developed a miss last week. Upon doing a little more investigation, determined that my FICM had taken a dump as the voltage would fluctuate between 48v and 34v. I was getting a DTC P0266 #2 cylinder contribution/balance to go with the miss. The interesting thing is that the symptoms would come and go, let it sit overnight and it would run fine for a few minutes and start missing again.
I ordered a rebuilt FICM installed it tonight. Steady voltage at 48.5v constant, truck started and ran great. Thinking to myself this isn't so bad these 6.0 liter things.....and about that time it started missing again after running great for about 30 minutes. I am now at a little bit of a loss to which direction to go next and looking for some advice. This is my DD and need it back ASAP......any suggestions?