Colt Vista 4WD L4-1997cc 2.0L SOHC (1985)
3.
Using a tachometer, check the idle speed. If it is not between 650 - 850 RPM, readjust it to 750 RPM using idle speed adjusting screw No. 1
(SAS1) (Figure 15).
4.
After the idle speed has been verified, adjust the basic ignition timing is 8 BTDC using the Service Manual procedure.
Note:
This is a new basic timing specification.
5.
Recheck the idle speed and adjust if necessary.
H. Test Feedback Carburetor
1.
Insert an exhaust gas analyzer probe into the tailpipe.
2.
Run the engine at 2500 RPM in neutral for 30 seconds and then record the tailpipe CO reading at 2500 RPM.
3.
If the CO reading is greater than 1.2%, re-check the installation of the jet mixture solenoid. Loosen the jet mixture solenoid and inspect it for
mis-alignment, cross threading or over torque. Install it correctly by following the procedure covered in steps A-8 to A-11.
4.
Run the engine at 2500 RPM in neutral for 30 seconds and then record the tailpipe CO reading at 2500 RPM.
5.
If the CO reading is 1.2% or less move to step 6. If the CO reading is still greater than 1.2% then an Idle Speed & Mixture adjustment must be
performed. Skip steps 6, 7 and 8 and proceed to Section 1.
6.
Turn off the engine, disconnect the tachometer and remove the analyzer probe from the tailpipe.
7.
Install the concealment plug into the hole to seal access to the idle mixture adjustment screw.
8.
Reinstall the air cleaner assembly.
9.
Move to Section K.
I. Adjust Idle Speed & Mixture Screw (If Necessary)
1.
Check any radio station presets and record them for reference. Turn off the ignition and disconnect the battery negative cable for about 3 seconds.
Reconnect the battery negative cable.
2.
Make sure all lights and accessories are off and the transmission is in neutral for this adjustment.
3.
Disconnect the exhaust oxygen sensor connector.
4.
Start the engine and run it for at least 5 seconds between 2000 and 3000 RPM.
5.
Run the engine at idle for 2 minutes.
