low rpm problem, maybe...

[Pakko]

When I start the sled it runs good on idle. But when I´m going to drive away it just blutter, and even stalls some times. And the temp light has gone off before I try to go, so it isn´t that problem.
If I manage to get it going it runs good (I think), I don´t have a AFR or lambda meter.
Can it be the TORS?

 

[YamRaider]

Have you had the air box off recently? If so I would check the vent hoses going to the air box for being disconnected. Also maybe try a new set of spark plugs?

 

[yamahas]

TORS would throw code.

 

[Pakko]

okey thanx! I hooked up the hose from the fuel pressure regulator to vacuum, and now it seems to work fine. The hose were just dangling in free air, is it like that stock?

 

[goggle]

Where did you attach the vacuum hose? On the throttle body?

 

[Pakko]

yes I attached it to the two trottle bodies. But it didn´t solwe the problem. So I disconnected it again and let it hang in free air like it should be stock. I will try to change sparkpluggs now.