New Dates - ECU Bulletin

[Huck Fonda]

Latest news on the ECU bulletin is that it will be mailed out on the 16th. A customer letter will follow a couple of days later, should be by Friday the 19th.

A query into parts availability indicates that the supply of ECUs may be thin at first, so take a deep breath everyone, and count to 10.

Also (and I apologize for not reading all the posts to see if this is already known), I just found the cause and resolution for this.

The original system would refresh atmospheric pressure data based on a relatively large throttle opening. The new one operates the same way, but aparently requires a much smaller "twist" before the refresh takes place. So when you're riding, you goose it a little as it starts to feel weak, and boom, fixed.

Good luck, and in the mean time, just give it twist past 20 degrees of throttle and see if it won't heal itself.

 

[twowheelnut]

Karma balance rapidly ascending outta the red zone. Keep it up! :good:

 

[dcarver]

Good luck, and in the mean time, just give it twist past 20 degrees of throttle and see if it won't heal itself.

Looks like Ashe had it right!

...and Huck - good job mon!

 

[kurtfriedrich]

Latest news on the ECU bulletin is that it will be mailed out on the 16th. A customer letter will follow a couple of days later, should be by Friday the 19th.

The original system would refresh atmospheric pressure data based on a relatively large throttle opening. The new one operates the same way, but aparently requires a much smaller "twist" before the refresh takes place. So when you're riding, you goose it a little as it starts to feel weak, and boom, fixed.

Good luck, and in the mean time, just give it twist past 20 degrees of throttle and see if it won't heal itself.

That's a good theory ... that would explain why I didn't get it yesterday. Going up a steep hill, into a stiff wind, I was mostly over 20% throttle, and lots of times much more.

But as for coming back down, with the wind at my back ...?? uhmmm can't explain why I didn't get it then?

 

[Warchild]

Prior to this model year, atmospheric pressure was read every 6 degree of throttle twist..... so this sampling rate was fairly high.

The 2007 FJR reads the atmospheric pressure every 20 degrees of throttle twist..... this is why many claim that an "aggressive, assertive" throttle hand seemed to prevent/cure the Altitude Surging problem. It doesn't, it just "masks" the problem, similar to the way folks would mask it by quickly shutting down and restarting the engine, which would force a barometric pressure reading, "curing" the problem until the next significant change in altitude.

Glad that Yamaha is stepping up. Though I realize the frustration level is great among 2007 owners for having a wasted riding season. Still, look at the positive: if this had been a BWM or Honda, not only you would NOT get acknowledgment of the problem, you would NOT get a fix, either.

So while it wasn't pain-free for 2007 owners, at least you HAVE finally gotten acknowledgment of the problem, and you now have a fix, too.

That's a good theory ... that would explain why I didn't get it yesterday. Going up a steep hill, into a stiff wind, I was mostly over 20% throttle, and lots of times much more.
But as for coming back down, with the wind at my back ...?? uhmmm can't explain why I didn't get it then?

<shrug> Who knows.... this surging issue may not manifest itself every single time you want it to.

And BTW, it's no "theory"..... this info comes directly from Cypress.

 

[Ignacio]

Karma balance rapidly ascending outta the red zone. Keep it up! :good:

Gunny for sure!

You know, one sentence in his one post has *perhaps* summarized and superceded what has been 750+ posts in at least 3 threads over four months on this forum. Unfrickin' believable.

There's probably some corporate consulting with triple digit hourly rate opportunity here.....hmmmm.....



In today's Internet culture the lesson to learn is invite and harness the energy of your best customers to be part of the solution. They'll buy more from you as a result.

 

[madmike2]

After reading Warchild's information, I wonder if the G2 throttle tube increases the sensitivity to the problem. Maybe the sharp ramp on the OEM throttle tube was meant to change the reading by the ECM. At least Yamaha has stepped up to the place, as thy always have, for the FJR community, and that because the FJR riders are well informed, ingenious about solutions (thanks to you engineering types) and passionate about the bikes being "right".

 

[TruWrecks]

twist past 20 degrees of throttle.

I have to smile every time I read that on the forum. That's the exact thing I told both my dealer, and Yamaha. I have even shown them the video. Now Yamaha uses that as the standard response.

 

[Kevin Daly]

Karma balance rapidly ascending outta the red zone. Keep it up! :good:

Yeah, I still think he's a weirdo of some kind. I'm just going to take a wait and see attitude

PS freakin glad i have an 04

 

[uctofeej]

I must ride like a total puss. Gotta turn it up a notch until I get the fix.

 

[Huck Fonda]

And BTW, it's no "theory"..... this info comes directly from Cypress.

WC must have a serious inside connection

 

[HaulinAshe]

Somebody (else) should determine exactly how much more the G2 throttle tube must be twisted to produce the same throttle opening as the OEM tube at 20 degrees.



According to Grumpy, I rarely stop short of WFO.

 

[Huck Fonda]

If the G2 tube "softens" the initial pull, it would stand to reason that you'd have to go a little futher at the wrist for the TPS to see the same degree of turn that it would with a stocker installed, no?

Exactly what that additional rotation is would be dependant on the radius of the curve, and since it's progressive, it might be tough to be exact.

My $0.02.

 

[Warchild]

And BTW, it's no "theory"..... this info comes directly from Cypress.

WC must have a serious inside connection

Several.

Though I was basically 'persona non grata' with them after the Timex saga in late 2004.

But some of our good friends at Cypress will still whisper in my ear, occasionally.

 

[Huck Fonda]

Is there a thread on that timex saga? I bet it's interesting reading.

 

[twowheelnut]

Is there a thread on that timex saga? I bet it's interesting reading.

Click here and scroll down to near the bottom of the first post. Make some popcorn, first.

 

[Constant Mesh]

The cost savings from deleting the baro sensor on the '06 & '07 may have been less than what they are going to spend replacing '07 ECU's.

 

[BrunDog]

Somebody (else) should determine exactly how much more the G2 throttle tube must be twisted to produce the same throttle opening as the OEM tube at 20 degrees.

If you compared two bikes that had PCIIIs, one with the G2, and the other without, you could measure the grip twist difference, because the PCIII software tells you the throttle opening, assuming it is calibrated properly, which it usually is and is easy to calibrate anyway.

-BD

 

[Huck Fonda]

The cost savings from deleting the baro sensor on the '06 & '07 may have been less than what they are going to spend replacing '07 ECU's.

Yeah, but the system needs it. Tweaking the ECU isn't the expesive part, it's giving them away that hurts. That's what they get, though, and I'm sure they budget for it to some extent.

They'll pay for it until they fix it.