Bike won't accelerate

[chocker]

Hi,
I have a 93 FJ and when I'm in 4th gear at about 3000 RPMs doing about 60 - 70 km/hour trying to accelerate it will not go any faster. I pull on the throttle and no more acceleration. To get out of this I downshift then upshift and it works. This has happened to me a few times. It seems to happen when the bike is cold. After that one time it never happens again during the ride. Has anyone else had this problem?

Thanks,
Mark

[jscgdunn]

Be great to hear what other folks think....both of our '92s do this from time to time.  I feel it is related to the complex system used to ensure you do not run out of fuel...the ignition drops down to two cylinders.  Does not seem to matter if the tank is full or not.  After a few seconds it comes back and runs fine.

Jeff

[ribbert]

Hi,
I have a 93 FJ and when I'm in 4th gear at about 3000 RPMs doing about 60 - 70 km/hour trying to accelerate it will not go any faster. I pull on the throttle and no more acceleration. To get out of this I downshift then upshift and it works. This has happened to me a few times. It seems to happen when the bike is cold. After that one time it never happens again during the ride. Has anyone else had this problem?

Thanks,
Mark

There's your problem, you've got to twist it.

Seriously, your not leaving the choke out too long are you? That would sort of be consistent with what you describe.

Noel

[jscgdunn]

There's your problem, you've got to twist it.

Seriously, your not leaving the choke out too long are you? That would sort of be consistent with what you describe.

Noel

Noel,
Not the choke, for sure, in our case.

Jeff

[chocker]

The choke is off at that point.

Mark

[andyb]

Weird.  Slides getting stuck down?

[FJmonkey]

Weird.  Slides getting stuck down?

I was thinking of the slides not moving freely, then breaking loose and working properly again.

[RichBaker]

Be great to hear what other folks think....both of our '92s do this from time to time.  I feel it is related to the complex system used to ensure you do not run out of fuel...the ignition drops down to two cylinders.  Does not seem to matter if the tank is full or not.  After a few seconds it comes back and runs fine.

Jeff

The ignition does NOT drop 2 cylinders!! I wish people would stop perpetuating this MYTH.....  The fuel pump is shut off, which causes the float bowls to run dry, which signals the rider to switch to reserve.   

[jscgdunn]

The ignition does NOT drop 2 cylinders!! I wish people would stop perpetuating this MYTH.....  The fuel pump is shut off, which causes the float bowls to run dry, which signals the rider to switch to reserve.   
[/quote]

I stand corrected and better informed...thanks.  I am pretty sure I picked up that nugget on this fourm somewhere.

Jeff

[Dan Filetti]

The ignition does NOT drop 2 cylinders!! I wish people would stop perpetuating this MYTH.....  The fuel pump is shut off, which causes the float bowls to run dry, which signals the rider to switch to reserve.   

So, what you're saying, is that the bike drops 2 cylinders to SAVE ON GAS, when it's low -Ahhh  -That clears that up -thanks!



Dan

[ribbert]

The ignition does NOT drop 2 cylinders!! I wish people would stop perpetuating this MYTH.....  The fuel pump is shut off, which causes the float bowls to run dry, which signals the rider to switch to reserve.   

I never had occasion to look into this, nor am I interested until mine stops working. But as Rich, and no doubt others know, there is a distinct difference in the symptoms or feel of how electrical vs fuel interruption to a running motor present.
The indication that you need to switch to reserve in entirely consistent with fuel starvation, not electrical interruption. It also explains the short delay and 'progressive' return to full power after switching to reserve, while the carbs refill. If the switch restored power to the coils, restoration of power would be instant, like flicking a light switch, which it's not.

I agree with Rich 100%

Noel

[Dan Filetti]

Noel-  I was poking fun at Rich a bit, -he was so emphatic...  In the event you did not get the subtlety of it...

[fintip]

I've never used my reserve switch, but I had heard this myth in the past.

For the '86-'88, however, do remember that there is no fuel pump, and it is controlled by a solenoid in the petcock--the reason why our petcock is so expensive. (Gives us an extra plug to deal with when reinstalling the tank, as well.)

[Pat Conlon]

All the FJ fuel reserve functions, being either petcock or fuel pump, are over rated. I don't like them.

[fintip]

You know, I'm not really strongly opinionated on them one way or another, though I have read (obviously) many pages worth of acrimony towards them.

But are the reserve solenoids on the '86 petcocks known to fail? And even if they do, does unplugging the sender solve the problem? My impression is just that people don't like nanny-features on their bikes, not that there is anything actually wrong with the features other than unnecessary complication from not doing it via mechanical means like every other bike out there.