Pickup 2WD L4-2.0L SOHC (1983)
8.
If idle speed increase is as specified in Table II, shut off the propane, remove propane hose from air cleaner, re-connect air duct, and on
FBC vehicles, re-connect the oxygen sensor.
9.
If idle speed increase differs more than 25 RPM from the speed increase values in Table II, adjust idle mixture as in Part B below:
B.
PROPANE-ASSISTED IDLE MIXTURE SET PROCEDURE
1.
Remove mixture adjusting screw (MAS) concealment plug as described in the Service Manual.
2.
When performing step 7 in Part A, if engine speed increases, go to step 3 below. If engine speed immediately decreases in step 7, instead
of increasing, then do the following:
a.
Close the propane main valve.
b.
Turn the MAS clockwise until maximum engine speed is reached.
c.
Turn the idle speed adjusting screw to get the specified "Propane Idle Speed" shown in Table II.
d.
Turn the MAS clockwise to bring the idle speed to "Curb Idle Speed" shown in Table II.
3.
Turn off the propane main valve and allow engine speed to stabilize. Slowly adjust MAS to achieve the "Curb Idle Speed" shown in
Table II.
4.
Repeat step 7 to re-check maximum engine speed. If more than 25 RPM gain is noted above "Propane Idle Speed" shown in Table II,
repeat steps 2a-2d above.
5.
Turn off the propane valves. Remove the hose from the air cleaner. Re-connect the fresh air duct. On FBC vehicles, re-connect the O2
sensor. On all vehicles, install a new concealment plug to seal the idle mixture adjusting screw (MAS).