becoyote
Well-known member
First trip since install and it seems it won't hold speed going downhill. Everything else is great.
Any ideas?
Any ideas?
audiovox downhill
- Thread starter becoyote
- Start date
Help Support Yamaha FJR Motorcycle Forum:
canyonman
Well-known member
what exactly do you mean?
mine varies a good 2-3mph between up and down hills
mine varies a good 2-3mph between up and down hills
ionbeam
2 FUN
If you are saying it speeds up going down hill...
1. your hand is not letting the throttle return, loosen your grip and let the throttle spring close the throttle
2. your throttle is sticking, not letting the throttle return
3. some hills are so steep that even with the throttle closed your speed will increase anyway
4. wildly unlikely, you have a vacuum leak, but his would come with a high, floating idle and poor engine performance
(lighten up your grip Francis :lol: )
1. your hand is not letting the throttle return, loosen your grip and let the throttle spring close the throttle
2. your throttle is sticking, not letting the throttle return
3. some hills are so steep that even with the throttle closed your speed will increase anyway
4. wildly unlikely, you have a vacuum leak, but his would come with a high, floating idle and poor engine performance
(lighten up your grip Francis :lol: )
Last edited by a moderator:
becoyote
Well-known member
I mean it completely disengages on any kind of downhill slope.
These were speeds around 70 mph give or take.
These were speeds around 70 mph give or take.
wfooshee
O, Woe is me!!
Is the bike accelerating under gravity, getting faster just by being downhill? (Then at the bottom of the hill it doesn't kick back in?) That may fool the CC into thinking it's not in control. It'll do the same thing if it can't hold speed uphill, falls to far behind the set speed, it will disengage for safety's sake on the assumption that something's wrong.
Also, does it do the same if your hand is not on the grip? (Checking to see if you're not death-gripping the throttle.)
Last edited by a moderator:
Jeff Q
Well-known member
That is what it is supposed to do to try to slow down, it is not able to apply the brakes so what else should it do. Guess I am not understanding what you are getting at either?
wfooshee
O, Woe is me!!
Backing off the throttle and completely disengaging are two different behaviors. If it's disengaging then it doesn't resume at the bottom of the hill. If it resumes, then it's working as designed.
becoyote
Well-known member
Completely disengages with my hand off the throttle. Spooked me the first time it did it because the bike slowed down very quickly and to a speed well below where it was set.
I did not coast to the bottom of the long hill so I am not 100% sure that it wouldn't have re-engaged at a certain point but it dropped more than 10mph from where it was set before I would grab the throttle again.
This might be hard for me to re-create locally too because it is pretty flat here in Va. Beach.
I first assumed a vacuum leak or not enough vacuum. I ordered the higher quality check valves and planned to come off all 4 cylinders instead of just one.
I had been reading threads though that say holding speed has nothing to do with vacuum.
Now I am not sure I want to change the configuration.
I did not coast to the bottom of the long hill so I am not 100% sure that it wouldn't have re-engaged at a certain point but it dropped more than 10mph from where it was set before I would grab the throttle again.
This might be hard for me to re-create locally too because it is pretty flat here in Va. Beach.
I first assumed a vacuum leak or not enough vacuum. I ordered the higher quality check valves and planned to come off all 4 cylinders instead of just one.
I had been reading threads though that say holding speed has nothing to do with vacuum.
Now I am not sure I want to change the configuration.
Jeff Q
Well-known member
I have not experienced that. My vacuum is off all four with a vacuum can as well, over kill I'm sure but not problems so far.
rfulcher
Well-known member
Is DIP switch #7 set to OFF for ECU source?
If DIP #7 is ON it can cause problems holding with elevation changes, the problem is worse in warm weather and may not show up on the flats or in cold weather. This tends to only be an issue with 2nd generation FJRs
If DIP #7 is ON it can cause problems holding with elevation changes, the problem is worse in warm weather and may not show up on the flats or in cold weather. This tends to only be an issue with 2nd generation FJRs
becoyote
Well-known member
I just returned from a trio to Idaho and had some of the same problems, my cruise control would cut out and sometimes would not re-engage for a while. I ride an 07 FJR.
As I didn't install the cruise control would you tell me where I can find Dip switch no. 7 so I can check it.
Thanks
Mac
rfulcher
Well-known member
There is an access cover on the servo on the opposite end of the servo from the servo. The DIP switches are located under this access cover (held on by 2 small screws) where the wires exit the servo.
Thanks much, I set no. 7 to off today. I tried out the cruise but hard to tell if it fixed it here as it usually worked on the flat land, it was just when I got into the mountains that it started dropping out. Guess that calls for another trip out west this year to see if I have a fix.
Thanks again
Mac
becoyote
Well-known member
I haven't changes dip switch 7 yet, but did tidy up my vac. lines, added the quality check valves and came off all 4 ports instead of just one.
Does changing the dip switch mean changing where you are actually taking the signal from?
Does changing the dip switch mean changing where you are actually taking the signal from?
ionbeam
2 FUN
No. Flipping the switch only changes the way the AVCC internally processes the signal. It changes the AVCC from expecting a complex point set ignition signal to expecting a cleaner digital ECU based signal.
