Date registered: Oct 2008
Vehicle: 1959 190, 1961 190SL, 1967 250SE 4Spd, 1968 220D 4spd
Mentioned: 1 Post(s)
Quoted: 5 Post(s)
aspiring solex expert here!
Beautiful car you have there. The PAITA is a good, easy to understand/use carburetor. If the car is running with the choke pulled (and i'm assuming it will also run if you depress the gas pedal), then what's likely happened is the idle circuit in one or both carburetors is clogged, malfunctioning, or severely unbalanced. The idle jet is a basically a little screw with a precisely made hole at the end of it, and this is what regulates fuel pressure at idle...any blockage here will result in what you are describing.
If this is the problem and you resolve it, the next issue will be to make sure the carburetors are pulling a balanced amount of air. You will need a synchrometer in order to do this.
Another slight possibility is also that the needle valve in one of your carbs is stuck in closed position, which would mean no fuel at all to one of the carbs. Easy to check if this valve is working with a slight disassembly of the top cover of each carburetor.