I just finished replacing a faulty head on my LI, prior to this point I had never had a false of any sort over 8 months (and 15K) of driving. That is with the exception of when the one head decided to fail.
Anyway on my way to work I found a speedtrap, ran through, held the jam a bit longer than normal and everything seemed to be working. Then a bit later I had a random false that lasted about 3 seconds. I didn't think much of it and assumed it was an Infinity. Then on the way home I had another false, but this time it lasted like 20 seconds and kept going on and off. My guess was that something triggered it and then it picked up its reflection off the car in front. Although in neither case did I spot an Infinity.
Since I'm headed off on a long trip tomorrow I'm just wondering if this is normal or if there is something wrong I should be concerned about?