Specifications

IGNITION CONTROL SYSTEM - CARBURETEDArticle Text (p. 2)
1984 Mazda RX7For iluvmyrx7.com
Cop
Leading Vacuum Control
Solenoid Valve Signal
1) Warm up engine to normal operating temperature. Connect a
tachometer to engine. Disconnect the vacuum sensing tube (from
leading vacuum advance diaphragm to pipe) at the pipe. Place a finger
over the pipe opening and make sure that air is not sucked into the
pipe.
2) Gradually increase the engine speed and make sure that
air is sucked into the pipe when the engine speed is 1000-2000 RPM or
more. Decrease the engine speed from 4000 RPM rapidly and make sure
air is not sucked into pipe while decelerating.
3) On vehicles with automatic transmissions, run the engine
at idling speed and make sure that air is sucked into the pipe when
the shift lever is in the "R", "D", "D1" or "D2" positions. On all
models, disconnect the connector from the number 1 water temperature
switch.
4) Connect a jumper wire to both terminals in the connector.
Pull out the choke knob about .6" (15 mm) and make sure that air is
not sucked into the pipe at any engine speed. Stop the engine and
disconnect the connector for the number 2 water temperature switch on
the radiator.
5) Pull the choke knob out about .6" (15 mm) and start the
engine. Increase the engine speed and make sure that air is sucked
into the pipe when the engine speed is 1000-2000 RPM or more.
Trailing Vacuum Control Solenoid
Valve Signal
1) Warm up engine to normal operating temperature. Connect a
tachometer to engine. Disconnect the vacuum sensing tube (from
trailing vacuum advance diaphragm to pipe) at the pipe. Place a
finger over the pipe opening and make sure that air is not sucked
into the pipe.
2) Gradually increase the engine speed and make sure that
air is sucked into the pipe when the engine speed is 2900-3100 RPM or
more. Decrease the engine speed from 4000 RPM rapidly and make sure
air is not sucked into pipe while decelerating.
3) On vehicles with automatic transmissions, run the engine
at idling speed and make sure that air is sucked into the pipe when
the shift lever is in the "R", "D", "D1" or "D2" position. On all
models, disconnect the connector from the number 1 water temperature
switch and connect a jumper wire to both terminals in the connector.
4) Pull out the choke knob about .6" (15 mm) and make sure
that air is not sucked into the pipe at any engine speed. Stop the
engine and disconnect the connector for the number 2 water
temperature switch on the radiator. Pull the choke knob out about .6"
(15 mm) and start the engine. Increase the engine speed and make sure
that air is sucked into the pipe when the engine speed is 1000-2000
RPM or more.
VACUUM SOLENOID VALVE
Leading Valve
1) Disconnect the vacuum solenoid sensing tubes from the
solenoid valve and vacuum pipe. Blow through the solenoid valve from
the vacuum sensing tube "B". Make sure the air passes through the
valve and comes out the air filter "C".
2) Disconnect the connector from the leading vacuum control
valve and connect battery power to terminals on the valve. Blow
through the valve from the vacuum sensing tube "B". Make sure the air
passes through the valve and comes out the port "A" of the valve.