Running on 3/4 cylinders

[Bldfgibbs]

Just picked up an 09 fz6r, only 1989 miles, it's been sitting for a little over a year they said. I replaced the exhaust, replaced the air filter, replaced the battery.
Now when I start the bike it idles extremly low, and only runs on 3/4 cylinders, If i rev it up, it dies when coming down in the revs, if i start riding and get on it hard, the fourth cylinder will kick in around 5k rpm and then shut off again on decel. I already ordered a power commander because the bike feels like its leaning out on idle, and I bought new spark plugs as well. But until those get here does anyone else have an idea of what may be wrong?

 

[milepig]

I wonder it the fuel system my be gummed up a bit after sitting that long. Perhaps run an injector cleaner through a tank of gas or two. Hard to say just what the problem really is. Hope you can solve it, let us know if you get it sorted.

 

[Just_Jim]

It sounds like a vacuum leak to me. You may have a disconnected vacuum line.

 

[Bldfgibbs]

I wonder it the fuel system my be gummed up a bit after sitting that long. Perhaps run an injector cleaner through a tank of gas or two. Hard to say just what the problem really is. Hope you can solve it, let us know if you get it sorted.

So i ran some cleaner through, replaced the spark plugs, got a fuel controller and now its runs perfectly!

 

[milepig]

So i ran some cleaner through, replaced the spark plugs, got a fuel controller and now its runs perfectly!

Good to hear. Do you know which one of these remedies was the one that fixed it?