solex cold idle way too low...

[kmon]

Hi everyone. My 73' gt still has the solex on it. It runs fantastic when its at operating tempture. I just rebuilt the carb, perviously my electric choke wasnt even connected. Its working fine now, but my idle speed isint changing from cold idle to hot. It stay at a constant 900 rpm. I know the manual advises a cold idle of closer to 3000 rpm. Playing with the linkage (the two nuts) dosent seem to raise to lower the rpm all that much. Any advice as to things I should look for? Thanks in advance for the help.

[namba209]

I would suggest you see if the choke plate is working and the linkage is all hooked and the electric choke is working. First, open the throttle slightly by hand and see if you can close the choke plate. If you can, see if the throttle stop screw is hitting on the cam plate steps. The cam is operated by a rod from the electric choke housing. The rod is attached to a bi-metallic spring that winds up and unwinds depending on the temperature inside the housing, there is a heating element inside the housing that causes the bi-metallic spring to do its' thing. It could be, if you rebuilt the carb you didn't hook up the bi-metallic spring to the choke rod, or that the thermostat housing isn't set correctly. The housing can be rotated to apply more or less pre-load on the bi-metallic spring, which causes the rod to rotate the cam plate at the throttle stop screw. This is not too descriptive but I hope this helps.

Ron

[West Coast GT]

Before any expensive fixes (like maybe a set of Webers) try the simple checks first.

In the morning when the engine's at it's coldest, pull off the carb cover. Look down the primary intake. You should see the choke plate is still open. Have a buddy or your main sqeeze press down once on the gas pedal. Your should see the choke plate close when they do this.

If that's working, then next let's take a look at the cam that bumps up the idle.

So check your throttle, then get back to the group.