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How to Hook Up a Throttle Cable

Throttle linkages are made in three basic configurations. Mechanical, or "bell-crank," systems are among the oldest and utilize system of levers and rods to link the gas pedal to the throttle. Cable systems that rely on a metal cable sliding within a flexible sleeve have largely replaced bell-crank mechanisms, which have always been prone to squeaks, rattles and hanging up. Electronic "drive-by-wire" throttles are gaining a foothold in the automotive industry but have yet to supplant the reliable cable. You can install a throttle cable in your driveway or garage.

Instructions

1

Crawl under the dashboard and locate the hole in the firewall through which your throttle cable will pass. Its typically located just above the gas pedal. Grasp the engine-end of the throttle cable and push it through the hole into the engine compartment, and continue feeding it through until the mounting flange on the sleeve hits the firewall.

2

Install the bolts that retain the sleeve mount to the firewall and hand-tighten them. Open the hood and reach into the engine bay to pull the cable up; lay it on top of the engine but do not connect it yet. Go back inside the car and pull the end of the cable over the forked split in the top of your gas pedal. Tighten the nut to clamp the cable to the gas pedal. Pull the pedal all the way up.

3

Install the engine-end of the throttle cable into the lever arm on your carburetor or throttle body. The procedure will vary by the type of engine. Some cables have a cylindrical piece on the end that locks into a slot in the throttle lever. For these types, pull the throttle lever all the way back, insert the cylinder into the recess on the side of the lever and feed the cable through the slot. If your throttle uses a retainer, push the throttle tip into the appropriate hole on the lever arm, then slide the retainer into the groove on the throttle tip to hold it in place.

4

Push the retainer on the end of the sleeve down into the retaining fork on the throttle cable bracket. Some applications have provisions for adjustment. If so, turn the adjuster nut on the sleeve until the cable is taut but not pulling on the throttle arm. Other applications dont use a forked throttle bracket; in these cases, feed the throttle cable through the hole in the bracket before connecting it to the throttle. Adjust the cable afterward.