w114 shaking promblem
 

Hello again!
I own a Mercedes w114 280 1972 (Europian model) with zenith carburetor 4A1 and it was working perfectly until yesterday.
when i start up the engine is shaking and the rpm are too low. When the car is running it does not do that.

What sould i do:(

Does the Zenith have a starting section within the carburetor like the Stromberg? If so, it could need to be cleaned.