Colt Vista 4WD L4-1997cc 2.0L SOHC (1985)
Fig. 4 Adjusting curb idle speed. 1985-86 Colt Vista w/Auto. Trans.
1985-86 COLT VISTA W/AUTO. TRANS.
On these models, curb idle speed is controlled by the idle speed control (ISC) servo. When adjustment of the idle speed is necessary, the ISC system
should be checked using the following procedure.
1.
Ensure all lights and accessories are in Off position.
2.
Disconnect electrical connector from electric fan motor and shift transaxle to Neutral or Drive.
3.
Remove concealment plug as described under ``Concealment Plug Removal'' in ``Carburetor.''
4.
Start and run engine until normal operating temperature is reached, then stop engine.
5.
Loosen accelerator cable tension.
6.
Turn ignition switch on for a minimum of 18 seconds, then turn switch off and disconnect electrical connectors from ISC actuator and oxygen
sensor.
7.
Start and race engine 2 or 3 times at 2000-3000 RPM, then return to idle for 30 seconds and adjust mixture adjusting screw to obtain a CO reading
of .1%-.3%.
8.
Adjust engine speed to 700 RPM using TPS adjusting screw.
9.
Tighten SAS, Fig. 4, until engine speed increases, then loosen SAS until the point just before speed decreases. From this position, loosen SAS an
additional 2/3 turn.
10.
Race engine several times and check that engine speed and CO are still within specifications.
11.
Adjust accelerator cable tension to provide proper contact with the idle switch.
12.
Reconnect ISC actuator and oxygen sensor electrical connectors.
