Installation Manual

8
WARNING: On automatic transmission vehicles only, install the transmission kickdown adjustment screw and black
retaining clip, as correctly indicated. Failure to attend to this detail may result in a sticking wide-open throttle or
dangerous uncontrolled engine speed.
Connecting the Transmission Linkage:
GM TH350, 200R4 /700R4
Attach the transmission kickdown stud (supplied) into the proper hole location on the throttle lever as seen in (Figure 7).
Attach the TV cable to the stud and adjust per transmission manufacturer’s specifications, using Chilton®, Motor®, or other
repair manual designed for your specific transmission.
WARNING: If you are unfamiliar with overdrive transmission TV cable adjustments, consult a qualified transmission expert. Failure to
properly adjust the TV cable on overdrive transmissions can lead to poor shifting and / or transmission failure. Holley
Performance Products assumes no responsibility for transmission damage or failure caused by improperly adjusted TV
cables.
Figure 7
CHOKE ADJUSTMENT:
IMPORTANT: Your Holley® carburetor has been factory wet flowed and calibrated. The “out of the box” settings should be
very close for all adjustments. The following tuning section is included ONLY to aid you in fine tuning
adjustments.
Electric Choke
1. You can control the choke operation by rotating the choke cap. If the choke comes off too soon, loosen the three screws and
rotate the cap counterclockwise one notch at a time, until the choke operation is satisfactory. If the choke comes off too late, rotate
the cap clockwise one notch at a time, until the choke operation is satisfactory. The choke setting from the factory is on “index” or
at center position. After making the final adjustments, start the engine and make sure the choke plate opens completely.
A. A choke that comes off too soon could exhibit one or more of the following symptoms: stalling, surging, backfiring, stumbles,
or poor vehicle driveability when the vehicle is cold.
B. A choke that comes off too late could exhibit one or more of the following symptoms: black smoke from the tail pipe, poor
driveability when cold, poor gas mileage, misses, or rough idle.
Manual and Electric Chokes
1. If the fast idle RPM is too low or too high for your preferences, SHUT DOWN THE ENGINE! Advance the throttle to wide-open,
exposing the fast idle set screw below the choke housing (Figure 8).
2. Using a 1/4” open end wrench, turn the screw clockwise to increase the RPM or counterclockwise to decrease the RPM. The
factory setting should give you a 1500-1600 RPM fast idle speed.
NOTE: All vacuum ports must be plugged at this time.