Are fuel injected engines more susceptible to fuel contamination?

I do not think so...becase all "systems" are designed to work as required.

In my carb 912 there is a gaslocator (coarse filter) then an inline slightly finer filter....

In my IS there is a Gaslocator, then an inline high capacity fine filter then the Injectors have an internal filter as well.

45 PSI EFI car systems have been around for decades and 100's of millions all with the multiple filter system and I have not heard people say modern cars have unreliable fuel systems.

Interestingly, I have a 30yo (EFI) car whose gas tanks (yes 2) began to rust, so we had quite a problem with particulate matter in the fuel system.  Changing out the fuel filter confirmed the problem, but didn't fix it, only new tanks would get to the root of it, and that was a BIG job on this particular car, requiring the engine to be removed.  Anyway, after all that got done, new aluminum tanks, I still had a problem... the fuel injectors were still messed up, and new ones were really not available.  Various injector cleaners were tried, but in the end the only way it got fixed was by manually cleaning out the residual rust particles, by hand.

If it had been an aircraft engine, it would certainly have created a forced landing for me the first time I lost power from this issue.  I'm pretty sure most Rotax engines don't have steel gas tanks, but particles in fuel can definitely cause big problems for any sort of engine.

30 year old car LOL...

I think the question was not if particles are possible, but rather IF EFI is inherently worse that Carburetted.

I can't say which is worse, only that they can definitely mess up fuel injectors pretty badly.  They can mess up carbs too, although I have yet to have that experience.

Glenn Martin wrote:

30 year old car LOL...

I think the question was not if particles are possible, but rather IF EFI is inherently worse that Carburetted.

It's if EFI is inherently worse at dealing with particles in fuel not if EFI is worse in general.

I see particles when I test fuel during preflight from time to time but with a carburetted engine it isn't that big a deal. If it was fuel injected then what would that mean? A few particles is a no go or is it fine as long as the fuel filters are in good condition?