Throttle Body: Adjustments

COMPONENT DESCRIPTION
The FIC is installed on the throttle body to maintain adequate engine speed while the engine is cold. It is operated by a volumetric change in wax located inside the thermo-element. The thermo-element is operated by engine coolant temperature.

COMPONENT INSPECTION AND ADJUSTMENT
1. If engine is not completely cold, remove throttle body from engine. Then, wait for at least 3 hours. (This step is necessary to bring the temperature of the thermo-element to the room temperature.





2. Measure thermo-element stroke (L) and room temperature.
3. Check thermo-element stroke (L) as shown in the figure. If the stroke is not within the range (1) replace thermo-element with new one. Then return to step 1 again.




4. Adjust clearance (A) between throttle stopper and throttle adjusting screw to specification by turning adjusting screw (S).

Models clearance (A) mm (in)
M/T 0.72 - 1.18 (0.0283 - 0.0465)
A/T 0.95 - 1.43 (0.0374 - 0.0563)

5. Rotate adjusting screw (S) clockwise or counterclockwise by Z turns according to the following equation, then tighten the adjusting screw lock nut.

Z = (L- LS*)/Y

*: Value of the specified line (Ls) at the temperature of thermoelement actually measured.

Y = 0.8 mm (0.031 in)

Direction of adjusting screw (S) rotation
(1) Positive (+) Z: Counterclockwise
(2) Negative (-) Z: Clockwise




For example: