I have a 2003 Nomad with 24,000 miles. I have all it services checks up to date and the last was done just two weeks before this problem. Three weeks ago I filled up at a local supermarket gas bar. Almost immediately it started to chug and chough. Home was only three miles away and I immediately put in some STP Fuel Injector cleaner. Went through three tanks of gas from a known source and tried water treatment and octane booster with no success. Finally gave up and put it into the dealer. They put it on the computer said they could not find anything. They did change the plugs, reset idle and replaced the air filter. They put in some fuel injector cleaner and said they cleaned the injectors. They said it was OK but I never even got home before I knew it was worse, It cost me a grand just to get it chug more and it will die if the throttle is closed for more than a literal second or two.
Back into the shop and now they are going to put in new injectors. This seems like hit and miss. They said they hooked it up to the computer and thus it should not be the ECM or other sensors.
What else can I try before I shoot the bike and put it out of my misery? The mechanics do not seem to know what to do.