Edelbrock 3842 Installation Instructions

STEP 1  Let engine cool, raise hood and disconnect the

negative battery terminal.

STEP 2  Remove the throttle body air inlet hose (two hose

clamps) and disconnect the water lines from

underside of the factory throttle body.

STEP 3  Disconnect throttle return spring from linkage and

unhook throttle cable by opening throttle and

slipping cable from cam groove.

STEP 4  Unplug the Throttle Position Sensor (TPS) and Idle

Bypass Valve (IBV).

STEP 5  Remove four nuts securing throttle body to intake. 

STEP 6  Remove the throttle position sensor (TPS) and Idle

Bypass Valve (IBV) from the stock throttle body

and transfer over to the new Edelbrock throttle

body using the existing screws. 

Be sure to use

supplied plastic bushing on the TPS. For

optimum performance, match the intake opening to

the new throttle body size for maximum air flow. 

STEP 7  Install new throttle body onto manifold using

supplied gaskets and torque to factory

specification (18 ft/lbs.).  

Edelbrock Corp.

2700 California Street

Torrance, California 90503

STEP 8  Some vehicles will require the use of a water

bypass tube ( not included in kit) to connect

coolant hoses (there are no water connections in

the Edelbrock throttle body).  

STEP 9  Re-attach return spring, throttle cable and the TPS

and IBV connectors. 

STEP 10  Re-install flexible hose to throttle body and airbox. 

STEP 11  Reinstall the negative battery terminal and refill the

coolant tank to allow for lost coolant. 

STEP 12  Turn idle screw counter-clockwise until you can

see between the screw and the throttle linkage

(set gap to 0.010" with feeler gauge, if possible),

then turn screw clockwise exactly one full turn. 

STEP 13  Be sure the idle bleed screw (brass slot head) is

turned clockwise until it bottoms in its bore. 

Do not

use too much force when bottoming screw. 

STEP 14  Start engine. If no idle can be achieved, turn brass

idle bleed screw counter-clockwise in small

increments, restarting engine until desired idle rpm

is achieved. 

Throttle Body Kit Contents:

1-Throttle body assembly

1-Gasket; throttle body

1-Gasket; Idle Bypass Valve 

1-Plastic bushing; Throttle Position Sensor

1-Installation Instructions 

•

Please study these instructions carefully before installing your new throttle body.  If you have any questions or problems,

please call our 

Technical Hotline at: 1-800-416-8628, 7:00 am - 5:00 pm,  Monday through Friday, Pacific Standard

Time, or e-mail us at 

edelbrock@edelbrock.com

.

• These parts are street legal in all 50 states for use on 1989-95 3.8 liter Thunderbird Supercoupes. 

INSTALLATION

Edelbrock Throttle Body #3842 (70mm) 

for 1989-95 3.8 liter Thunderbird Supercoupe

Installation Instructions

Rev. 10/02

Brochure # 63-0150

©2002 Edelbrock Corp.