What year DL1000?
I mean, that doesn't make a hell of a lot of difference to diagnosing this, but it makes some difference in the odds of various issues. Older bike, certain things are more likely.
Here's my wild-ass probably low percentage guess: is the bike wearing a failed Power Commander? Make sure the Power Commander's black ground wire is hooked up to the negative terminal of the battery. If that doesn't help, take the Power Commander out of the equation completely. Unplug it from the injector connectors (you can usually juuuuuuuuuust barely reach these by reaching through the frame), inspect the connections for corrosion, then plug the bike's injector connectors together and see whatchya got.
And please, please, please shitcan that starting fluid. That crap is dangerous, damages your engine, and does not tell you anything useful. It has no place in anyone's garage.
2002 Suzuki DL1000 V-Strom, Dark Metallic Space Blue
1983 Suzuki GS850G, Cosmic Blue
2005 KLR685, Aztec Red - Turd II.2, the ReReTurdening