Daihatsu F300 Service Manual page 1166

ENGINE MECHANICALS
• CHECK AND ADJUSTMENT OF CO/HC CONCENTRATIONS
[HD-C Engine]
•
•
•
• Warm up the engine thoroughly.
• All accessory switches are turned OFF.
On those vehicles equipped with a day-lamp system,
set the lamp control switch to the first stage.
• The air cleaner element is installed.
• All vacuum hoses are connected.
• Ensure that the intake system exhibits no air leakage.
• Ensure that the exhaust system exhibits no air leakage.
CO adjustment
1. Adjust the idle speed.
(See
page EM-23.)
2. Race the engine until its speed reaches 2000 rpm .
3. Measure the CO concentration at the idle speed. Check to
see if the CO concentration conforms to the specification.
Specified CO Concentration:
1.5 ± 0.5%
If the measured concentration fails to conform to the
specification, perform the adjustments described in the
step 4. onward.
4. Using the following SST, gradually turn the mixture adjust-
ing screw so that the CO concentration may conform to the
specification.
SST:
09243-87201-000
5. Turn the throttle adjusting screw so that the idle speed may
become the specified speed.
6.
Measure the CO concentration. Check to see if the CO
concentration conforms to the specification.
If the repeated adjustments will not get the conformity to the
specification, carry out the trouble shooting in accordance
with the table next page .
EM-25