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K-Jet running rich? 140-160 1974

posted by  uniberp on  Wed Apr 13 11:03 CST 2005
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last visit: Mon Jan 31 07:08 CST 2011
[RELATED]

Turning the Oh1 screw anticlockwise raises the fuel plunger relative to the airflow position sensor, thereby reducing the fuel sent to the injectors.
Left leans out the mix.
Mark where you started, and depart from that only carefully and gradually.

More items come to mind. The control pressure regulator aka warmup regulator, and the Aux air regulator.
Both mounted on the intake manifold. CPR sets control pressure, i.e. counter fuel pressure against intake air flow to prevent over-rich. Has low pressure at cold, high pressure at warm. Check the electrical connection to the CPR and to the Aux Air regulator.

Shine a light through the aux air regulator cold to see if air is allowed through. Warm should close.

http://www.ncr-pca.org/tech/tech-cis.htm

--
MPergiel, Elmhurst, IL '74 145e T-5 'Orange Alert'






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