Vacuum problem??

[1nc 2000]

http://www.ty4stroke.com/threads/fault-codes-relay-fuse-location-wire-diagram-diagnostics.83992/

Check out this post for checking for codes. This may help with your idle issue.

 

[NytroMisfit]

Just one other thing to think about. Is the Throttle Position Sensor could be faulty possibly.

 

[ts3519]

Just follow the fuel supply line up to the fuel rail (back side of engine) injectors are between throttle bodies and valve cover. I do have a diagram at home, currently up north winterizing boats and pwc's. Let me know if you want me to send diagram on Monday.

Sent from my XT1080 using Tapatalk

 

[johnelway]

Just one other thing to think about. Is the Throttle Position Sensor could be faulty possibly.

how can i check this?

 

[johnelway]

Just follow the fuel supply line up to the fuel rail (back side of engine) injectors are between throttle bodies and valve cover. I do have a diagram at home, currently up north winterizing boats and pwc's. Let me know if you want me to send diagram on Monday.

Sent from my XT1080 using Tapatalk

Yes please!

 

[NytroMisfit]

how can i check this?

Not sure but found this on the forums I believe it was for an apex but im sure its the same idea.

"i found my manual but its a pdf and i cant figure out how to copy.
this is the best i can do.
it dont make a lot of sense the way its pasted here. sorry

CHECKING AND ADJUSTING THE
THROTTLE POSITION SENSOR

NOTE:
Before adjusting the throttle position sensor,
the engine idling speed should be properly
adjusted.
1. Check:
• throttle position sensor
a. Disconnect the throttle position sensor coupler.
b. Remove the throttle position sensor from
the throttle body.
c. Connect the pocket tester (Ω Ã— 1k) to the
throttle position sensor.
d. Measure the maximum throttle position
sensor resistance.
Out of specification → Replace the throttle
position sensor.
e. Connect the pocket tester (Ω Ã— 1k) to the
throttle position sensor.
Positive tester probe →
black/blue terminal
Negative tester probe → blue terminal
Maximum throttle position sensor
resistance
3.5 ~ 6.5 kΩ at 20°C (68°F)
(blue – black/blue)
Positive tester probe → yellow terminal
Negative tester probe → blue terminal

f. While slowly opening the throttle, check
that the throttle position sensor resistance
is within the specified range.
The resistance does not change or it
changes abruptly → Replace the throttle
position sensor.
The slot is worn or broken → Replace the
throttle position sensor.
NOTE:
Check mainly that the resistance changes
gradually when turning the throttle, since the
readings (from closed to wide-open throttle)
may differ slightly from those specified.
2. Adjust:
• throttle position sensor angle
a. Connect the throttle position sensor coupler
to the wire harness.
b. Connect the digital circuit tester to the throttle
position sensor.
c. Measure the throttle position sensor voltage.
d. Adjust the throttle position sensor angle so
the measured voltage is within the specified
range.
e. After adjusting the throttle position sensor
angle, tighten the throttle position sensor
screws.
Throttle position sensor
resistance
0 ~ 5 ± 1.5 kΩ at 20°C (68°F)
(yellow – black/blue)
Tester positive probe → yellow terminal
Tester negative probe → blue terminal
Digital circuit tester
90890-03174
Throttle position sensor voltage
0.63 ~ 0.73 V
(yellow – black/blue)
THROTTLE BODIES"

 

[ts3519]

nytro injectors. you need to get a manual, chapter 7 has some good reading for trouble shooting fuel delivery problems and self diagnose thru the instrument cluster.

 

[herndonp]

Normal engine idle should be 1500 +/- 50 RPM when engine is at normal temp. You might just need to adjust your idle up and check to see if this helps with the issue. If you have over 2500 miles I would replace sparkplugs as well. It maybe just that simple as long as you have fresh gas and not old untreated gas (bad gas will get you every time).

Good luck

Pete

 

[johnelway]

Normal engine idle should be 1500 +/- 50 RPM when engine is at normal temp. You might just need to adjust your idle up and check to see if this helps with the issue. If you have over 2500 miles I would replace sparkplugs as well. It maybe just that simple as long as you have fresh gas and not old untreated gas (bad gas will get you every time).

Good luck

Pete

How can i adjust the idle?

 

[herndonp]

You can't as the computer controls it. I was thinking of another machine when I said that. Probably get yourself a manual that can help you troubleshoot and setup your machine. I think you can search for nitro service manual and there is a free download(PDF)

Pete

 

[NytroMisfit]

I would think if it was a major issue it would pop a code on the display or engine light. I have a feeling it's something stupid and simple probably maintenance related .

 

[herndonp]

Here is a link to free manuals copy and paste into google

http://www.marclatulippe.com/ManuelShopMotoneige/Yamaha/