Ford — Service procedure for Ford LSG-423 2.3 Litre(4cyld) Service Manual.pdf

A Ford service procedure — check it applies to your exact model before use.

Procedure

Connect fuel inlet, outlet, and fuel tank return lines.
Remove nut and lockwasher retaining the pump rocker arm and pump link.
Remove the bowl cover screws.
Separate the bowl cover from the carburetor body. Do not pry. Tap gently from side to side with a plastic hammer or screwdriver handle.
Remove the accelerating pump operating rod retainer screw and retainer.
Rotate the pump operating rod and disconnect the pump drive spring and accelerating pump assembly (Fig. 16). Set the pump assembly aside. Do not immerse in cleaner. A new pump cup is in the kit.
Rotate the pump operating rod and remove the rod and grommet from the bowl cover (Fig. 17).
With a bearing scraper or a scraper ground from an old triangle file remove all the staking from the vacuum piston retainer (Fig. 18).
Remove bowl vent valve from rod if so equipped. The rod cannot be removed.
Remove hot idle compensator valve cover, valve and gasket from cover, if so equipped.
Turn the carburetor body upside down and remove the pump discharge ball and weight (Fig. 20). Save the old ball in case the seat needs staking (Fig. 25).
Remove the fuel inlet valve and fitting assembly; remove gasket. Remove spring float shaft retainer,
Remove the main jet with a jet wrench. A 3/8” wide square point screwdriver may be used (Fig. 22).
Remove the power valve assembly with a proper socket or a 3/8” wide screwdriver balde with a 1/16” x 3/8” deep slot sawed in the center of the blade. The slot will clear the power valve stem and prevent damage (Fig. 23).
Check the battery posts and battery cable terminals for clean and tight connections. Remove the battery cables (if corroded), clean and install them securely.
Check for clean and tight wiring conenctions at the alternator, regulator and engine.
Check the alternator belt tension and tighten to specification (if necessary). 4-04 Charging System 4-04
If the charge indicator lamp does not come on with the ignition key in the ON position and the engine not running, check the I wiring circuit for an open circuit or burned out charge indicator lamp (ignition switch to regulator | terminal).
If the charge indicator light does not come on, disconnect the wiring plug connector at the regulator and connect a jumper wire from the | terminal of the regulator wiring plug to the negative battery post cable clamp.
The charge indicator lamp should go on with the ignition key turned to the ON position.
|f the charge indicator bulb does not go on, check the bulb for continuity and replace (if burned out).
If the bulb is not burned out, an open circuit exists between the igntion switch and the regulator.
Connect the negative lead of the voltmeter to the negative battery cable clamp (not bolt or nut), and the positive lead of the voltmeter to the positive battery cable clamp (not bolt or nut) (Fig. 9).
Record the battery voltage reading shown on the voltmeter scale. .
Connect the red lead of a tachometer to the distributor terminal of the coll and the black tachometer lead to a good ground.
The, start the engine and operate the engine at approximately 1500 rpm. With no other electrical load the voltmeter reading should increase 1 volt and not exceed 2 voits above the first recorded battery voltage reading. The reading should be taken when the voltmeter needle shops moving.
With the engine running, turn on all the electrical equipment.
Increase the engine speed to 2000 rpm. The voltmeter should indicate a minimum of 0.5 volt above the first recorded battery voltage (Fig. 8). if the above test indicate proper voltage readings, the
If the voltmeter reading indicates over voltage (more than 2.0 volts above battery voltage), stop the engine and check the ground connections between the regulator and alternator and/or regulator to engine. Clean and tighten connections securely and repeat the Voltmeter Test Procedure.
If over voltage condition still exists, disconnect the regulator wiring plug from the regulator and repeat the Voltmeter Test Procedure.
If over voltage condition disappears (voltmeter reads battery voltage), replace voltage regulator and repeat the voltmeter test procedure.
If over voltage still exists with the regulator wiring plug disconnected, repair the short in the wiring harness between the alternator and regulator. Then, replace the regulator and connect the regulator wiring plug to the regulator and repeat the Voltmeter Test Procedure.
If the voltmeter reading does not increase (one volt), check for the presence of battery voltage at the alternator BAT terminal and the regula
If the voltmeter reading does not increase one volt above battery voltage, proceed to the next step before performing other tests, the field circuit (regulator plug to alternator) must be checked for a grounding condition. If the field circuit is grounded and the jumper wire is used as a check at the regulator wiring plug from the A to F terminals (Figure 10), excessive current will cause heat damage to the regulator wiring plug terminals and may burn the jumper wire (Fig. 10). Also, if the field circuit was grounded, the connector wire inside the regulator will be burned open and an under voltage conditon will
The field circuit should be checked with the regulator
lf the field circuit is satisfactory, disconnect the regulator wiring plug at the regulator and connect the jumper wire from the A to the F terminals on the regulator wiring plug (Fig. 10).
If the Voltmeter Test results still indicate (under voltage), repair or replace the alternator. With the jumper wire removed, connect the wiring to the alternator and regulator.
Repeat the Voltmeter Test Procedure.
Connect the positive lead of the voltmeter to the § terminal of the regulator wiring plug (Fig. 10). Then, turn the ignition switch to the ON position. Do not start the engine. The voltmeter reading should indicate battery voltage. If there is no voltage reading, disconnect the positive voltmeter lead from the positive battery clamp and repair the S wire lead from the ignition switch to the regulator wiring plug.
Connect the positive voltmeter lead to the positive battery cable terminal, connect regulator wiring plug to regulator and repat the Voltmeter Test Procedure.
Disconnect the regulator wiring plug and install a jumper wire between the A and F terminal.
With the engine idling, connect the positive lead of the voltmeter to the S terminal and then to the | terminal of the regulator wiring plug (Fig. 10). The voltage of the S circuit should read approximately 1/2 of the | circuit.
If no voltage is present, repair the alternator or the wiring circuit at fault. Reconnect the positive voltmeter lead to the positive battery cable terminal.
If the above circuit tests are satisfactory, install a new regulator.
Then, remove the jumper wire from the regulator wiring plug and connect the wiring plug to the regulator. Repeat the Voltmeter Test Procedure.
Disconnct voltage regulator wiring plug.
Connect a jumper between ‘‘A” and “‘F” terminal of voltage regualtor wiring plug.
Note voltmeter reading.
If voltmeter reads 1/2 of battery voltage, diodes are okay.
If voltmeter reads approximately 1.5 volts, alternator has shorted negative diode, or a grounded stator winding.
If voltmeter reads approximately 1.5 volts less than battery voltage, alternator has shorted positive diode.
lf voltmeter reads about 1.0 to 1.5 volts less than 1/2 battery voltage, alternator has an open positive diode.
lf voltmeter reads about 1.0 to 1.5 volts more than 1/2 battery voltage, alternator has an open negative diode.

Source: manual:Ford LSG-423 2.3 Litre(4cyld) Service Manual.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.