Hey guys,
I just wanted to let you know that I had the hard start scenario happening on our 06 FX. Same scenario that I saw on the YouTube videos and read about on this forum. I own a shop and work on these vehicles. I looked at e-v-e-r-y-t-h-i-n-g, throttle body, ECM signals, you name it. The battery was testing good, but was the original, at 5.5 years old. I installed a MTP 24F battery in it and the next startup it was gone, period. This is my wifes vehicle and she said it starts with more authority than she can ever recall. I can't tell you exactly the reason why, maybe this a/c amplifier thing draws too much current at startup when the batteries are not up to full pop and causes the issue?? But for what it is worth, if the battery is old....or cheap...put a good one in and see if it goes away.