Are we rediscovering fire here ?
It caused engine failure because not enough safety is built in to the system yet. Make misfire a lot more devastating.
This is the biggest rumor and untrue.
This rumor started from a lack of understanding what is happening and linked an engine failure to their PI.
The reason is lack of tuning itself. The most dangerous thing associated with PI is open loop. An ethanol car has a large percentage of fuel added to the fuel scalar + PI for additional fuel. A lack of tuning can cause the need for extreme stft's and a maxed out stft will kick the car into open loop. Why is this so bad on e85 cars? Well, an open loop car not only has no lambda feedback, but you also lose all your additional fuel in the scalar. The result is a full load pull without lambda control and 25-35% fuel pulled out. Stay in it long enough and boom.
Any other ideas? I've seen this a few times. I do believe it has claimed at least 2 or 3 motors of those really pushing things, maybe more. I do not say this to scare people from PI... just the way I interpret the nuances of many logs I've seen. 98% of the time PI works great, it's a cheap and effective solution etc. Stay away from misfires and you're good.
Do you think the source of the misfires is something that can be cleared up with a PR or BL coil upgrade or is it something inherent with the PI?