Let's figure out this choke issue...
The choke plate is completely closed with the engine cold and the fast idle screw sitting on the high lobe of the plastic cam - good so far.
Pushing the choke rod back all the way (like it would be with a warmed engine), the choke plate is fully open - like you would expect, right?
Uh, oh! Notice what is happening at the high speed cam/screw? That's right, nothing. I have been told as the engine warms and the choke begins to pull the plate open, the link rod on the cam should slowly rotate it so that the high speed screw drops to the second step and then subsequently continues to lower the rpm as the plate opens more. Finally, when the engine is completely warmed to the point where the plate is fully open, the link rod has rotated the cam off the fast idle screw and the curb idle screw then maintains engine idle.
See in the second pic how the choke plate is fully open but the link rod to the cam has just made contact with the top of the slit in the choke plate's shaft? And the high speed screw remains on the high lobe? Further, you can see in the third pic where the cam is rotated off the high speed screw, but the cam link rod isn't even making contact with the top of the slit in the choke plate's shaft.
Shouldn't the link rod be adjusted so that as the choke opens, the rod contacts the top of the slit and begins to apply pressure to the cam? Then, as the plate opens farther, the cam is rotated to affect the high speed and curb idle screws?
Anyone have time to confirm what their Carter BBD does through the choke/warm up cycle?
The choke plate is completely closed with the engine cold and the fast idle screw sitting on the high lobe of the plastic cam - good so far.
Pushing the choke rod back all the way (like it would be with a warmed engine), the choke plate is fully open - like you would expect, right?
Uh, oh! Notice what is happening at the high speed cam/screw? That's right, nothing. I have been told as the engine warms and the choke begins to pull the plate open, the link rod on the cam should slowly rotate it so that the high speed screw drops to the second step and then subsequently continues to lower the rpm as the plate opens more. Finally, when the engine is completely warmed to the point where the plate is fully open, the link rod has rotated the cam off the fast idle screw and the curb idle screw then maintains engine idle.
See in the second pic how the choke plate is fully open but the link rod to the cam has just made contact with the top of the slit in the choke plate's shaft? And the high speed screw remains on the high lobe? Further, you can see in the third pic where the cam is rotated off the high speed screw, but the cam link rod isn't even making contact with the top of the slit in the choke plate's shaft.
Shouldn't the link rod be adjusted so that as the choke opens, the rod contacts the top of the slit and begins to apply pressure to the cam? Then, as the plate opens farther, the cam is rotated to affect the high speed and curb idle screws?
Anyone have time to confirm what their Carter BBD does through the choke/warm up cycle?