'06 Will not Start

[waltonr1]

I have a weird issue that I hope someone has seen in the past.

Last week I did a 3100 mile trip with no problems.

Returned home, parked the bike.

Tried to start it yesterday and it turned over but would not start.

Long story short...pulled the plugs and they are dry, no fuel.

The fuel pump sounded normal, and after checking it, it is pumping fine.

No blown fuses, nothing electrically un-plugged (that I can tell).

One additional piece of information is I did remove the sidestand to have it shortened and re-installed it between my trip and yesterday. Checking the shop manual the switch appears to be a "normally-open" device that breaks the wire connection when the sidestand is in the up position. Everything mechanically with the swtich appears normal however, so I can't believe that is the problem.

I am going to verify it is good with an Ohm meter tonight, just to be sure.

Is there anything else that you guys have seen that would cause this problem.

One other piece of info: It makes no difference if the sidestand is up or down, or if the clutch is engaged or not - same results - the bike spins over, but will not start.

Thanks in advance!

Stan

 

[odot]

3100 miles? You oughta gas? Otherwise....recheck the switch and connections to the sidestand. A 30 pack of keystone light says that that is the problem.

 

[JamesK]

From your description you've not touched the spade connectors under the clutch, but if either of these came loose the result would be the same as the side-stand switch problem. I assume that you've confirmed that the kill switch button hasn't been accidentally tripped. Another test is to put the bike in Neutral and try starting, since that will ignore the state of the side stand.

 

[Geezer]

Um, I know it's obvious, but the kill switch is on, right? I have to agree with the side stand switch being the likely problem.

I was going to suggest a flooded condition but you said the plugs are dry.

It could also be the ignition switch. Odd timing, but possible. Have you had the recall replacement done? Nah, I guess the fuel pump would not run if this was the problem.

 

[reecebike]

Check plugs to see if its fireing? If not could be side stand If fireing its not stand!

 

[Fred W]

Send that rack of Keystones to New Hampshire.

The start motor will be inhibited if the sidestand switch is open, or if the kill switch is off for that matter. Oh and the clutch switch only matters if the bike is not in neutral, but it too would inhibit the starter motor.

Since the engine is turning over, it is none of that stuff. Either no spark or no fuel. Since the plugs are dry (if they really are), I suppose I'd suspect loss of fuel.

 

[PA1195]

I have a weird issue that I hope someone has seen in the past.Tried to start it yesterday and it turned over but would not start.

Stan

Any luck Stan? Guess you have the Service Manual. There's a bunch of diagnostics in the Fuel Injection section. Trouble codes and an actuator operation table where you can get the ign and fuel components to operate. Are you sure you have fuel pressure? Guess you can hear the pump pressuring up then shutting off before startup ok. If not, check the fuel pump relay and connectors on the bottom of the fuel tank. You said the fuses were all ok. Run the actuator diagnostic would be my next step.

Gary in Fairbanks

 

[waltonr1]

Ok - here is the update - actually it is pretty ugly!

Yesterday I checked a couple of things (switches, connectors, etc.) – Found nothing really wrong.

I was going to go into the diagnostic mode and see if that would help me track down the issue.

So I put the tank on it, and just tried to start it for the heck of it, it fired up and ran like crap for 2~3 seconds and shut off.

Tried it again and it ran like crap, but I was able to keep it running. After about 15~20 seconds it seemed to run better, but I wasn’t sure it would idle.

I backed off the throttle and it shut off at idle.

I started it again and it ran perfectly – I mean perfectly.

Good idle, good throttle response, no diag code faults – no nothing.

Just some ‘ole fat dude standing there with this dumbfounded look on his face ! :blink:

So the good news is that it runs / the bad news is I did nothing to fix it - sorta' scares me!

Anyway thanks for the advice

 

[ScottMDMC]

That also happened to me once. It was after a long trip and the bike sat for almost a week. I did not pull the tank though, I just cranked it with the throttle full open till she fired. She ran like crap for a little till she cleared out and has ran fine ever since. My guess is it was some kind of vapor lock. It has never happened again.

Scott

 

[bikesniffer]

Ok - here is the update - actually it is pretty ugly!
Yesterday I checked a couple of things (switches, connectors, etc.) – Found nothing really wrong.

I was going to go into the diagnostic mode and see if that would help me track down the issue.

So I put the tank on it, and just tried to start it for the heck of it, it fired up and ran like crap for 2~3 seconds and shut off.

Tried it again and it ran like crap, but I was able to keep it running. After about 15~20 seconds it seemed to run better, but I wasn’t sure it would idle.

I backed off the throttle and it shut off at idle.

I started it again and it ran perfectly – I mean perfectly.

Good idle, good throttle response, no diag code faults – no nothing.

Just some ‘ole fat dude standing there with this dumbfounded look on his face ! :blink:

So the good news is that it runs / the bad news is I did nothing to fix it - sorta' scares me!

Anyway thanks for the advice

...this should teach ya to listen to her; she's telling ya loud and clear :You can't ride me hard for 3100 miles and then just let me sit and wither away in your garage, I'm a horse that needs its muscles exercised regularly, so don't phuck with me ever again, you just saw what happens when I pout... :yahoo: :clapping: :blink:

Alfredo

 

[waltonr1]

That also happened to me once. It was after a long trip and the bike sat for almost a week. I did not pull the tank though, I just cranked it with the throttle full open till she fired. She ran like crap for a little till she cleared out and has ran fine ever since. My guess is it was some kind of vapor lock. It has never happened again.Scott

That is just too weird - I hope mine only happens once.

At least I got the plugs changed and it runs now - so I am a happy boy! :yahoo:

 

[Hit the Road Jack]

Sounds alot like condensation accumulating in the bottom of your tank after sitting for an extended period.

 

[v65]

I am kind of surprised at the responses because this is a pretty common FJR ailment and well documented hereabouts. Try starting it with the throttle wide open next time.

 

[PA1195]

I am kind of surprised at the responses because this is a pretty common FJR ailment and well documented hereabouts. Try starting it with the throttle wide open next time.

I believe Yamaha went from an open to closed rail fuel supply system with the 2006 model year. The early open rail system with it's fuel-to-tank return via the pressure regulator may have allowed better vapor purging than the later closed system (speculation). If that's the case, then full throttle starts should purge any vapors quicker on the newer design. That may be what just happened via the fix. I assume that once a vapor lock is formed, that the fuel pump won't supply fuel until the line pressure drops via injector flow and the pressure sensor calls for pump action.

It's very common in some fuel injected aircraft engines for something like this to happen when the injector lines are above the hot engine. We'd try to idle the engines some if possible before shutdown to help prevent fuel vaporization in the injector lines. Successful restart consisted of brief on-off throttle application (which forced fuel through the line and vapors hopefully out) before cranking. Too much throttle resulted in a flooded condition, with the pilot quickly pulling lean mixture while cranking until the F/A ratio allowed a restart. Makes for interesting fun on a flowing river with the world drifting close by.

Gary in Fairbanks