sputters and loads up at higher altitude

[madsledder]

I have a 04 Rx1m with a powderlite 25 turbo. I run from 2000ft to 6000ft.I'm useing 127.5 mains with the needle in the middle.The pilots are only out 1 3/4 wich helped down low,and am only running 4 1/2 psi fuel presure with the engine off.I'm also going through a tone of fuel a tank in 60k. Any ideas would be greatly appreciated.

 

[Ted Jannetty]

I have a 04 Rx1m with a powderlite 25 turbo. I run from 2000ft to 6000ft.I'm useing 127.5 mains with the needle in the middle.The pilots are only out 1 3/4 wich helped down low,and am only running 4 1/2 psi fuel presure with the engine off.I'm also going through a tone of fuel a tank in 60k. Any ideas would be greatly appreciated.

drop the needles all the way.

Ted.

 

[madsledder]

I'll try that, as the only other sgestion is my cams are out. Wich could be also as i have had troubles getting boost up. It seems to like 5lbs, but have had it spike to 10.

 

[Ted Jannetty]

I'll try that, as the only other sgestion is my cams are out. Wich could be also as i have had troubles getting boost up. It seems to like 5lbs, but have had it spike to 10.

OH also drop you fuel pressure to 3 psi.

Ted.

 

[madsledder]

Ted have you seen this before? Even stock it loaded up in the higher elevations.

 

[Ted Jannetty]

Ted have you seen this before? Even stock it loaded up in the higher elevations.

I am only making suggestions based on the informantion you have provided.

I would need alot more information to make a determination as to what is definately wrong.

Ted.

 

[madsledder]

Heres a list.
-it floods out when i park faceing down hill.
-looses power as i go up in elevation.
-very hard on fuel.
-Loads up if I don't stay on the throtle up high.
-gets harder to start the longer it is shut off.
-troubles getting my boost up.
-letting it cool down doesnt help.
Thats all I can think of right now,if it can help .Thanks for any input

 

[fatchance]

check the air filter

 

[Ted Jannetty]

Heres a list.
-it floods out when i park faceing down hill.
-looses power as i go up in elevation.
-very hard on fuel.
-Loads up if I don't stay on the throtle up high.
-gets harder to start the longer it is shut off.
-troubles getting my boost up.
-letting it cool down doesnt help.
Thats all I can think of right now,if it can help .Thanks for any input

Sounds like your floats are tooooo high.

Ted.

 

[Colorado Yamaha]

What Ted said, I've had many to all of those symptoms - floats fixed them and the carb heater shut-off fixed the hard starting.

 

[woodsrider]

Check your air intake, if it is exposed to a lot of heat instead of cold air it will load up also. Make sure you are pulling cold air in thru the intake.

 

[madsledder]

I've got the floats set to 15mm. what you have yours set at.Also the coolant line is shut off unless you mean the electric heaters?

 

[Ted Jannetty]

I've got the floats set to 15mm. what you have yours set at.Also the coolant line is shut off unless you mean the electric heaters?

You need the coolant running through the carbs or they can ICE up.

You might also check the needle and seat orings they dry up and shrink causing fuel to go around them.

Ted.