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Hi Tom, my name is ***** ***** I will be helping you today.
Flooding and Vapor lock are both things that can and do happen with EFI engines. This wouldn't be a vapor lock issue, but flooding would fit the issue, and it would happen if the fuel pressure regulator was bad and fuel pressure was to high on the engine. It can also happen if the injectors are leaking down. Do you have a fuel pressure gauge to check fuel pressure?
Okay, no problem. Did you have any further questions for me on the issue?
I'll answer any question you have on the engine. But if you don't have the tools required to do any testing there is nothing I can do about that. Hi fuel pressure would fit the symptoms. But other things would cause it as well, such as a bad sensor. Checking fuel pressure would be step 1. If that is actually within spec, hooking it up to a scan tool is step two. Being a fuel injected engine there is very little a DIY person can do on these engines. Did you want to get your hands on a fuel pressure gauge and get back to me, or what would you like to do?
To get back here you would simply log back into the website. You can use a standard automotive fuel pressure gauge on the engine. So if pep boys sells them then that would be fine.
No the scan tool is Marine specific, and a car one would not work. The cheapest one on the market runs 400 bucks, and it is very basic in function. (and you really have to know what you are doing in order to use one effectively)
You are very welcome. Let me know how you make out on the fuel pressure check.