Renault Express does not start well

Good afternoon I have a 92 Renault Express (F8Q with Bosch bomb). The engine starts badly when it has been stopped for a while (about 20 sec. After having heated 4 or 5 times) once it starts it seems that it sounds like in three cylinders you touch the accelerator and does not obey and even wants to stop and sounds a strong taque tracheteum. When 10 sec. It is already stabilized then you can stop and return that starts without problem and whenever it starts it sounds for 3 sec. A stronger claqueteo then is removed. The engine has the heaters well. The pump put a carafe with 2 transparent hoses one at the entrance and another at the exit and all good. The point of the camshaft pump and the crankshaft is well the valve rule almost well. It can happen to him, I would appreciate it very much

Check the advance valve

You mean the metallic cable that reaches the pump. Valve is in the cylinder head

Check the overflow valve that will surely have lost strength of the spring and escape the pressure of diesel. It goes in the injected pump, in the diesel return tube. You will see your head like a screw, it will surely be Wash 17 or 19. Greetings !!

Hello, I think it looks like an injector check it and starts ruling out a greeting things