Horizon/TC3 L4-105 1720cc 1.7L SOHC VIN A 2-bbl (1982)
3.
Next, manually close the choke blade as much as possible without stalling the engine, while at the same time, covering the idle air bleed port with
your finger. Do this for about 20 seconds, two or three times in a row. The high vacuum level generated in the idle system during this procedure
should "pull out" the foreign material.
4.
Return throttle to the curb idle position and:
a.
If the problem has been remedied, set idle speed to specification and shut off engine.
b.
If some improvement is noticeable, but the idle does not yet seem "right," repeat Steps 2 and 3 to see if further improvements can be made.
c.
If no improvement is observed, go to Step 5.
5.
Shut off engine and apply shop air (no greater than 60 P.S.I.) to the idle air bleed port. Use caution when doing this because the pressure will
probably blow fuel straight up from the carburetor's internal vent area.
6.
Restart engine and attempt to adjust curb idle speed. If this procedure fails to give a satisfactory idle, follow the procedure in Step 7 below.
7.
Remove the carburetor air horn.
Apply shop air to all air bleed and fuel circuits in both the main body and air horn repeatedly blowing out the circuits in an alternating pattern.
Replace carburetor air horn. Start engine and attempt to adjust curb idle speed.
8.
If the above procedures do not resolve the problem, or if the problem recurs, a thorough bench teardown and cleaning of the carburetor will be
required.
POLICY:
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