My engine always can't slow down when it after running a long striaght road.
It need to wait 2 sec, then the RPM will drop.
Why?? will it because it's too rich?
I've try to extand the exhaust plastic tube ( The one which give pressue to the fuel tank).
Seems help a bit, but still have the same problem.
Please help me out.
I think WTO's advice is good. I have similar problem and after riched by 1/2 turn the situation improved alot. However, I found my engine is real bad on fuel consumption. Any idea?