[amissner]

Hi. Help me diagnose an issue I am having with my 2005 VX1100 with 71 hours on it. It was working fine two weeks ago, but when we went out today it was missing pretty bad at idle. I can hear it missing through 5,000 RPM as well. It may be missing above that, but I cannot hear it.

It does seem to run perfectly at speed. I can still hit the same top speed of about 56 MPH and it sounds fine.

The only thing that I can think of is the gas I poured in last week after we were done was fouled. There is a fair chance it was from the bottom of the tank at the gas station because they had a few pumps shut off and marked out of order.

Does this sound like bad gas? Should I worry about it or drain the gas? In other words, can it hurt anything or should I just run it to almost out of gas and fill it up with better fuel.

Thanks for your insights.

 

[Ernest T]

Bad fuel most likely. I'd run the old stuff out and replace (try increasing octane if it is knocking). Other possibility is debris in fuel injector. Less likely possibilities include a fouled air filter or fouled spark plug(s)........I think these are less likely, because they are usually associated with a significant loss in performance.