[Esel Mann]

Norm,

You sure that aux fan is adequate and pulling air over the entire engine like the main fan did? What you have doing primary duty is an aux. or auxillary fan. Typically from a system perspective, the function of auxillary differs from primary. Even when the fans are identical, their placement can dictate what and what they cannot do.

Fuel boiling at the rails on start-up seems unlikely. At that point everything is "cold". Fuel boiling when running could be due to not enough circulation? Hence maybe your pump is approaching the end of life or there is some sort of issue with the pressure regulator(s)?

I presume you've got some sort of euro 928, hence no Ox and no cat? So the negative impact on av-gas would be minimal? What about the fuel injectors? Any possibility of av-gas blend causing problems there? (I have no clue but it did come to mind for some reason.)

Ethanol is known to attack seals of earlier cars. You may want to give everything a good look over. Maybe there's a seal for something or other in either the pressure regulator(s) or the fuel pumps for which the ethanol (over time) has essentially rendered non functional ?

Does the 928 have an idler valve like the 911's? If so has it been verified that it is functional? I have to presume it is because your description indicates a start-up problem, hence if it is the idler valve, you would still stall if idle, engine warm.

You should not be having combustion/starting issues for an ethanol blend which is fresh and under driving conditions. This is also true for mowers, chain-saws, and vibrators. I run using FL gas. Though I am in Orlando and not FT Lauderdale. No issues thus far. Though I do so with 911's and not a 928.

Which brings me to..... the following which you may want to additionally consider, or not consider:

- For the station where you regularly filled up, how often was/were the deliveries for the premium (I presume your were filling up with premium)? What I am getting at here is, maybe premium is no longer selling too well at your station and hence has been sitting for a while? Ethanol is a great absorber of moisture, hence if their tanks are regularly replenished, you can be certain there is going to be more water in the gas.

- Is there any potential that there is some sort of ingress point for water/run-off to enter into the station's tank? For example old tank(s), or even inadequate water/run-off drainage for the tank area. We have been experiencing some good rainfall here recently. I could see water getting into those tanks if the station owner cut corners with their fuel station.

- Is there any potential that someone is stealing the gas (at the station) and replacing it with water?

- Have you or perhaps someone you know used the same gas from the same station from the same grade? Did they have problems?

- Your profession is aviation, hence I presume you leave the 928 for longer, ish periods of time? Is there any possibility with the 928's age, that this is correlated?

- Have you posted on the 928 forum the problem? Perhaps another 928'er had a similar/identical problem, identified it, and solved it.

I hope you are able to identify the root cause and solve this problem. 928's are becoming rare and I'd hate to see one less on the road. They're absolutely beautiful. I wish I could find a white one down here in FL which was well maintained and cared for. So far no dice. But I did recently pick up a nice 964.