MGB High rpm problem

[Carlbanan56]

It looks like it, but i want to make sure.

 

[bobhustead]

You are not going to be able to visually determine small increments of openness of the butterflies.
Bob

 

[JPSmit]

When I get home after school I will be taking the carburetors off and make sure the throttle valves are fully closed.

Looks like the temperature is about 7 deg. in Sweden today. Put on a sweater and take it for a run first. 1500 rpm isn't way out of line and I am convinced that it is something simple. Butterflies don't go out of alignment ove the winter.

 

[Carlbanan56]

I think I found the problem. The throttle return spring was very worn. It did not close the throttle valve tight enough. I will be buying a new spring and se if this solves the issue. Thank you all guys for your time and effort. It is greatly appreciated.

 

[Carlbanan56]

 

[NutmegCT]

 

[bobhustead]

No, this is not the case. The throttle valve is closed.

Sheesh.
Bob

 

[JPSmit]

I think I found the problem. The throttle return spring was very worn. It did not close the throttle valve tight enough. I will be buying a new spring and se if this solves the issue. Thank you all guys for your time and effort. It is greatly appreciated.

Often the easiy thing! great news and well spotted