Toyota TERCEL 1985 Repair Manual page 179

Idle Mixture Adjusting Screw
Idle Mixture
Adjusting Screw
Idle Speed Adjusting Screw
FUEL SYSTEM - Carburetor
(e) Use a 7.5 mm <f> (0.295 in. <f>) drill to forcé the plug
MAS Plug
FU0097
3. INSPECT MIXTURE ADJUSTING SCREW
(a)
(b)
If the drill has gnawed into the screw top or if the tapered
portion is damaged, replace the screw.
4. REINSTALL MIXTURE ADJUSTING SCREW
Fully screw in the idle mixture adjusting screw and then
unscrew it the specified amount.
Screw revolutions (counterclockwise):
NOTE:
tightening the screw too tight.
5. REINSTALL CARBURETOR (See page FU-24)
6. ADJUST IDLE SPEED AND IDLE MIXTURE
(a)
(b)
(c)
NOTE:
EGR vacuum modulator bracket.
FU0100 FU0101
(d)
Idle mixture speed:
NOTE:
(e)
FU0102
off.
Blow off any steel partióles with compressed air.
Remove the screw and inspect it.
3A-C (ex. Canadá Wagón M/T)
1
3 A revolutions
1
Others 2 A revolutions
Be careful not to damage the screw tip by
Initial conditions (See page FU-25)
Start the engine.
Set to the máximum speed by turning the IDLE MIX-
TURE ADJUSTING SCREW.
Insert a small screwdriver between EGR valve and
Set to the idle mixture speed by turning the IDLE
SPEED ADJUSTING SCREW.
700 rpm
Make adjustment with the cooling fan OFF.
Before moving to the next step, continué adjust-
ments (c) and (d) until the máximum speed will not
rise any further no matter how much the IDLE MIX-
TURE ADJUSTING SCREW ¡s adjusted.
FU-29