Choke (Fast Idle) Opening
Fully close choke valve. Measure clearance between primary throttle valve and wall of throttle bore. Clearance for Federal vehicles should be 0.035 - 0.040" (0.9 - 1.1 mm); for California vehicles 0.051 - 0.059" (1.3 - 1.5 mm). If not, bend fast idle rod until proper clearance is obtained. See Fig 1.