[chivas08]

Muchas gracias asi lo hare, eso me parece, que es muy simple, me he bajado un documento del fabricante del carburador y pone:
Adjusting Idle Mixture Screw
To adjust the idle mixture screw correctly, the throttle plates must be nearly closed. Please do the following:
NOTE: Engines with Thunderbolt V ignition systems must have the ignition module put into ‘base timing’
mode before turning key to start the engine. After adjustments, shut engine off. Remove the module
grounding wire, then restart the engine to take module out of ‘base timing’ mode.
1. Disconnect throttle cable.
2. Set idle speed (RPM) screw so engine idles at 550-600 RPM in neutral gear.
3. Adjust idle mixture screw.
4. Reset the idle speed screw until engine idles at its recommended RPM.
5. Adjust and connect throttle cable.

Seguire estos pasos.
Muchas gracias de nuevo