Have a El Diablo that is almost 2 years old. Has performed flawlessly until just now. After it warms up it wants to run rough. We can shut it down let it sit for a bit, start it back up and it will do the same thing again. No real rhyme or reason to it. So far we have replaced fuel filters, fuel supply pump, air filter, new plugs (gapped at .030), and checked for DTCs, this is a Kohler ECH740 EFI. The only code is a 61 which I have found it no code, that just signals the end of code reading. Not sure what to look at or do next? Any insight will be greatly appreciated.