Edelbrock 3843 Installation Instructions

INSTALLATION INSTRUCTIONS 

Edelbrock/BBK 62mm Polished Throttle Body 

Catalog #3843 

for 1992 and Later 1.5L and 1.6L Honda 

• 

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. 

• 

Description: Designed for Honda 1992 and later 1.5L and 1.6L. 

Throttle Body Kit Contents: 

1 

−

 62mm Throttle Body Assembly 

1 

−

 Chrome Back Off Plate 

1 

−

 Throttle Body Gasket 

1 

−

 Block Off Plate or Map Sensor Gasket 

1 

−

 Billet Aluminum Piece with Press Fit Bypass Valve 

2 

−

 M4 x 10mm Block Off Plate Screws 

1 

−

 Bypass Valve Gasket 

1 

−

 Throttle Position Sensor Gasket 

3 

−

 M6 x 20mm Bypass Valve Bolts 

2 

−

 M5 x 8mm Throttle Position Screws 

Installation Instructions 

1.  Make sure the engine is completely cool and set the 

parking brake on the vehicle. 

2.  Raise hood and check the throttle position sensor (TPS) 

voltage.  Turn the ignition switch to the ON position, but 

do not turn on the engine.  Use a digital volt/ohmmeter 

and write down the voltage as a reference for 

installation.  The voltage should be approximately 0.5V 

to 0.99 V. 

3.  Disconnect the negative battery terminal. 

4.  Remove air filter duct, all vacuum hoses, water 

(coolant) hoses and electrical connectors from the stock 

throttle body. 

Note:  Engine coolant may run from the hoses once 

removed. 

5.  Disconnect the throttle linkage by opening the throttle 

manually and slipping the cable from the cam groove on 

the linkage. 

6.  Remove the four nuts securing the throttle body to the 

intake manifold and remove the factory throttle body. 

7.  Remove the throttle position sensor (TPS) from the 

factory throttle body.  You must carefully grind or file 

away the heads of the rivets. 

8.  If the factory throttle body has a bypass valve at the 

bottom install the supplied billet aluminum piece using 

the bolts (3-M6 x 20mm) and gasket. 

9.  If the factory throttle body has a map sensor mounted 

on the topside remove it and install it on the new throttle 

body.  Use the supplied screws (2-M4 x 10mm) and 

gasket.  If not the supplied chrome back off plate must 

be installed in this location with the supplied gasket and 

screws (2-M4 x 10mm). 

10.  Install the throttle position sensor (TPS) on the new throttle 

body using the supplied gasket and screws (M5 x 8mm). 

Note: To achieve maximum benefits you should match the 

intake opening on the factory intake manifold to the size of 

the new throttle body bore.  The factory manifold should be 

bored or hand grinded “OFF” the engine.  Refer to the 

l for removal and installation of the factory 

intake.  Use the gasket as a template to mark the manifold 

for grinding. 

11.  Using the factory nuts and the supplied gasket install the 

new throttle body on the factory intake manifold and 

secure. 

12.  Slip the cable on the throttle linkage. 

Note:  More slack may be needed on the linkage in order 

for the butterfly to close completely. 

13.  Observe the throttle body while an assistant presses and 

releases the gas pedal to ensure that the throttle plate both 

opens and closes fully. 

14.  Reattach the air filter duct, all vacuum hoses, water 

(coolant) hoses and electrical connectors on the new 

throttle body. 

15.  Any unused vacuum ports on the new throttle body must 

be plugged. 

16.  Reconnect the negative battery terminal. Turn the ignition 

switch to the ON position, but do not turn on the engine.  

Adjust the throttle position sensor (TPS) to the stock 

voltage by slightly loosening the mounting screws and 

rotating the TPS to the desired voltage.  Then retighten the 

mounting screws. 

17.  Start the vehicle and check for loose connection or coolant 

leaks, etc. 

18.  After the vehicle is warmed up check the idle speed (refer 

to owners manual).  If the idle is to low adjust it by turning 

the bypass screw (gold screw 12 o’clock position from the 

vacuum tube) counter clock wise with a flat blade 

screwdriver. 

19.  Double-check the fasteners and clamps to ensure they are 

all secure. 

2000 Edelbrock Corp.             

Edelbrock Corporation

••

2700 California Street

••Torrance, California 90503

Rev. 1/24/00