Daihatsu F300 Service Manual page 1351

EMISSION CONTROL SYSTEM
Inspection of VTV
1. Remove the VTY. Blow your breath into the VTV from the
carburetor side (side 8). Ensure that the air passes through
without restriction.
If significant restriction exists, replace the VTV.
2. Blow your breath into the VTV from the throttle positioner
side (side A). Ensure that there is restriction.
If no restriction exists, replace the VTV.
EC-12
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B
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