FICD

(Difference between revisions)

Revision as of 05:38, 24 November 2011

Fast Idle Control Device (F.I.C.D.) was fitted to Datsuns with factory-fitted Aircon. This means 1979-up models with air conditioning. The FICD raises the idle speed automatically when A/C is ON to respond to the increaesed load.

Overview

FICD consists of two parts, a throttle actuator, and a magnetic vacuum switch. The switch is electrically operated off the compressor signal. The switch then lets vacuum go to the actuator, which pulls the carburetor throttle a little (about 100 RPM).

Vacuum Switch

The vacuum switch has two wires:

• Ground/earth
• Signal, which goes to the compressor switch

Fast Idle Actuator

1. Clearance 'C' should be more than 3mm, Engine fully warm, A/C off.
2. Start engine and set correct warm idle speed (650 RPM in 'D')
3. Turn A/C ON, in 'N' and adjust engine speed to 800 RPM.

1. FICD adjusting screw
2. Lever 'A'
3. Lever 'B'
4. Cable lock screw

North America

B310

1979 A14 & A15 models had optional A/C.

Idle Setting

A14/A14 Manual Transmission

• A/C OFF: 700 rpm
• A/C ON: 800 rpm

A14/A14 Automatic Transmission

• A/C OFF: 650 rpm in "D"
• A/C ON: 800 rpm in "N"