Mazda 1984 RX7 Specifications Page 11
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AIR INJECTION SYSTEM - EFI
Article Text
1984 Mazda RX7
For iluvmyrx7.com
Copyright © 1998 Mitchell Repair Information Company, LLC
Saturday, June 08, 2002 10:42PM
ARTICLE BEGINNING
1984 EXHAUST EMISSION SYSTEM
Mazda Air Management Systems - Fuel Injected Models
RX7
DESCRIPTION
The air management system consists of the following sub-
systems: Air Injection, Secondary Air Control, Air Induction and By-
Pass Air Control. The air injection system controls CO, HC and NOx
emissions by injecting secondary air into the exhaust system to cause
further burning of exhaust gases. System consists of an air pump, 2
check valves, an air control valve, relief solenoid valve, switching
solenoid valve, heat hazard sensor and catalytic converters.
Air is drawn from the clean side of the air cleaner by the
air pump and directed to the air control valve under pressure. From
the air control valve, secondary air is directed (by the switching
solenoid valve) "downstream" to the pellet converter or "upstream" to
the exhaust port.
The air induction system brings air into the engine for
combustion functions. The system consists of : Air Cleaner, Air Flow
Meter, Air Funnel, Throttle Chamber, Dynamic Chamber and Intake
Manifold.
The secondary air control system contains 2 check valves to
prevent exhaust gas from leaking back into the air pump. The switching
solenoid valve directs secondary air through the air control valve
"downstream" and/or "upstream", based upon engine temperature,
manifold vacuum and engine speed.
The By-Pass Air Control System (BAC) controls the amount of
by-pass air to maintain idling speed. System is controlled by a vent
solenoid valve and vacuum solenoid valve.
COMPONENT OPERATION
CONTROL VALVES
Air Control Valve
Directs air to 1 of 3 locations; exhaust port, 3-way catalyst
or back to the relief silencer. Consists of air relief valve, air
switching valve and anti-afterburn valve.
Air Supply Valve
Supplies by-pass air into dynamic chamber during A/C and
power steering operation.
By-Pass Air Control Valve
Controls amount of by-pass air to maintain idling speed.
Controlled by vent solenoid valve and vacuum solenoid valve.
Check & Cut Valve
Releases excessive pressure or vacuum in fuel tank to
atmosphere. Prevents fuel loss if vehicle overturns.
Relief Solenoid Valve
Relieves secondary air to air cleaner when unnecessary.
Split Air Solenoid Valve
Controls amount of split air. The valve increases split air
- A - ENGINE/VIN ID 2
- CHECK VALVES 5
- AIR CONTROL VALVE 5
- Copyright 6
- CARBURETOR - NIKKI 4 8
- CHOKE RELAY 9
- HEAT HAZARD SENSOR 9
- END OF ARTICLE 10
- AIR INJECTION SYSTEM - EFI 11
- Article Text 11
- AIR INJECTION SYSTE 12
- Copyright © 1998 Mitchell 13
- IR INJECTION SYSTEM 14
- AIR INJECTION SYSTEM 15
- 1984 Mazda RX7For iluv 16
- CARBURETOR - NIKKI 4-BBL 21
- CHOKE LINKAGE 22
- CHECKING CHOKE DELAY 23
- CHECKING AUTOMATIC 23
- CHECKING CHOKE RELAY 24
- 1984 Mazda RX7For iluvmy 25
- THROTTLE OPENER 26
- 1984 Mazda RX7F 27
- OVERHAUL 27
- DISASSEMBLY 27
- REASSEMBLY 28
- Article Text (p. 2 30
- 1984 Mazda RX7For iluvmyrx7.c 32
- THROTTLE SENSOR 32
- DECELERATION CONTROL 33
- THROTTLE SENSOR TEST 36
- DASHPOT TEST 37
- EMISSION APPLICATION 38
- FUEL EVAPORATION SYSTEM 40
- FUEL EVAPORATION SYSTE 41
- FUEL INJECTION SYSTEM 42
- FUEL INJECTOR TESTS 44
- INJECTOR OPERATION 45
- INJECTOR RESISTANCE 45
- Article Text (p. 5 46
- Article Text (p. 7 48
- INSTALLATION 49
- FUEL PUMP - ELECTRIC 50
- FUEL PUMP - ELECT 51
- PRESSURE REGULATOR 52
- IGNITION CONTROL SYSTEM - EFI 56
- IGNITION SYSTEM 58
- TESTING 60
- HIGH TENSION WIRE 60
- PCV SYSTEM 65
- PCV SYSTEMArticle Text (p. 2) 66
- VACUUM DIAGRAMS 68
- TUNE-UP - ROTARY 70
- TUNE-UP - ROTAR 71
- IDLE SPEED 72
- Copyright © 78
- CHECKING PROCEDURE 85
- PORT AIR SWITCHING VALVE 85
- 1.3L ENG SECONDARY AI 87
- Fig. 8: View of Fuse Panel 88
- HI IDLE SPRRD OR HU 95
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