Low idle on '10. FJR

[kiteflyer]

Bike has 12516 miles on it and has developed a stumbling low idle (500 - 600 rpm) after sitting this winter.

I have installed new plugs, air filter and the TBS is spot on. I had to set the idle to 1000 - 1100 by the throttle and my Vista cruise. The idle adjustment screw is turned clockwise all the way up and has been since I picked up the bike new. The throttle free play has also been checked and adjusted.

There is also an intermittent yellow "check engine" light. The service manual says that an error code should be associated with the light, but there is none. Just the yellow light.

Other than the low idle, the bike runs fine. It should, it's got new plugs and air filter.

I am totally perplexed as to what is causing this low idle. Looks like I may be forced to take it to the dealer if I can't get an idea to fix this problem.

 

[RadioHowie]

Easy fix...whoever did your TBS screwed up the idle.

Back out the TBS adjusting screws an equal amount for each screw, and your idle will rise accordingly.

Then, you can turn it back down with the idle adjuster screw.

 

[escapefjrtist]

Although it pains me greatly...what ^^^ Howie says.

The air screws are turned in so far that you're out of idle speed adjustment.

--G

 

[Chiefblueman]

It gives me no pain to agree with Howie. Had to perform this on my gen1 to regain use of the idle speed adjuster.

This isn't the first time I've seen somebody experiencing pain when agreeing with you, Howie. What have you done to these people?

 

[wfooshee]

Second possibility is that the idle screw had been backed out far enough to come out of its threads, and it's actually not connected at the far end of the cable. If that's the case, you'll need to remove the tank, tool tray, and air box so you can reach the cable and reseat the threads. It goes into the bottom of the throttle body assembly.

This is not a disagreement with Howie, as that is the most likely cause, but I'm just pointing out another possibility.

 

[RadioHowie]

It gives me no pain to agree with Howie. Had to perform this on my gen1 to regain use of the idle speed adjuster.
This isn't the first time I've seen somebody experiencing pain when agreeing with you, Howie. What have you done to these people?

Beats hell outta me!?!? I've always been

on this forum. :rofl:

Second possibility is that the idle screw had been backed out far enough to come out of its threads, and it's actually not connected at the far end of the cable. If that's the case, you'll need to remove the tank, tool tray, and air box so you can reach the cable and reseat the threads. It goes into the bottom of the throttle body assembly.
This is not a disagreement with Howie, as that is the most likely cause, but I'm just pointing out another possibility.

It pains me greatly to agree with wfooshee, but his opinion is one of only a handful on this forum that I trust worth a nickle.

 

[Constant Mesh]

The 2010 has a different idle adjust system from the Gen I models. When you turn the idle knob a metering air valve is opened and closed. The valve meters idle control air via hoses to each of the throttle bodies.

Don't believe the metering valve is buried under a bunch of stuff. When you raise the tank the valve is visible just behind the fuel rail. It is directly above TB3. You can see the idle adjust cable/hose connected to the right side of the valve. Got this from service manual drawings. I have an 2004 with the original idle control system.

It's an improvement except for the additional air hoses -- something else to leak.

 

[wfooshee]

So much for Howie's opinion of me......

Somebody has got to bring me a Gen-II (and III?) to dissect! So's I can appear to know more about what I'm talking about.

 

[kiteflyer]

My hat's off to RadioHowie. I turned all four air screws for 1 & 1/2 and the idle came right up . Thanks for the tip. I learned something about proper TBS adjustments .