Hi all.
Well firstly the biggest problem with my car is its hard to start and the starter motor doesnt turn over the engine when hot at operational temperatures.
2ndly its runing far way to rich coz even after retarding completely from the dizzy the spark plugs are dark black in color.
3rdly my venturi is stuck it doesnt even rotate and on applying force through screw driver its face breaks down as its of brass or something.
My carb is of civic 95 D15B3 1st generation civic engine.
I want to know whether i need to screw the venturi to lean it or i need to unscrew it for leaning it so as to adjust the float level?????
Well dont suggest me for changing timing, starter motor, battery or checking grounds as i checked them and they are fine. The richness problem is in carb and its causing vapour lock making it hard to crank and even turn over.
It cranks and catches fire fine when cold
Thanks for your co-operation.
Regards to all.
Carburretor Venturi stuck?
You have a miss understanding about the Venturi in a carburetor. The venturi is the portion that the air passes through and is measured in mi-la meters at its base. Typical 28 MM venturi based carburetor. The screw that you mentioned I suspect is the idle air mixture screw. The further you turn the screw in the leaner the mixture becomes. Do not and I repeat do not force the screw or bottom it out as this will spread the seat and you will loose all ability to correctly set the mixture at idle. I do suspect that you have a bleed over problem that is causing a over rich condition. Look down the venturi with the motor running, do you see raw fuel dripping into the venturi? If so you need to rebuild the carburetor. Throttle plates are known for allowing scavenge air, so check for wear in this area if your having the carburetor rebuilt, it will make a big difference.
