Demon Fuel Systems 4402020VE - Manual (Page 10)

10
Complete the following steps to wire and tune the electric choke:
1. Run a wire from a switched +12V source to the connection on the pod cover marked with a (+).
Run a second wire from the terminal marked (-) to a good ground. See Figure 14.
Figure 14
2. There are two primary adjustments: the choke idle speed screw and the choke timing. The choke
idle speed screw controls how far the primary butterflies are open when the choke butterfly is
closed or partially closed. It sets your fast idle. The screw is located on the bracket that is slipped
over the throttle shaft, behind the choke pod. This idle can be increased by turning the choke idle
screw clockwise, or decreased by turning it counterclockwise. It is important to note that when the
choke butterfly is open completely (vertical up and down), the choke idle speed screw must not be
holding the primary butterflies open at all. In other words, when the choke idle speed screw is in
the deepest cut on the fast idle cam, it must not be hitting the fast idle cam.
Figure 15 Figure 16
3. Rotating the black pod cover controls the choke timing. To rotate the cover, loosen the three Allen
screws that secure the cover to the pod. (See Fig. 16) Rotating the cover clockwise will decrease
the amount of time it takes the choke to pull off, while counter-clockwise will increase the time it
takes. This adjustment will depend on your climate and the vehicle it is installed on.
4. One final note, dependent on which air cleaner / air cleaner gasket is used, it may be necessary to
put a slight dimple into the air cleaner to allow the full range of motion of the choke shaft and
butterfly. Failure to do so could result in an engine that is stuck with a high idle, which could make
the vehicle hard to control and stop.
CAUTION: As with any modification, inspection of the part after completion is a must. Before use,
check the linkage for freeness of operation. Your safety depends on it.