The content of harmful substances in exhaust gases is given in Table 2.1.
Table 2.1. Content of harmful substances in exhaust gases
| Idle control (warm engine)* | Fuel (minimum octane number) | ||||
| Content of harmful substances in exhaust gases** | |||||
| Speed (rpm) | CO (%) (1) | CO₂ (%) | NS (million*No.) | Lambda (λ) | Unleaded petrol |
| 800 | 0.5 max | 14.5 max | 100 max | 0.97 ＜ λ ＜ 1.03 | (95 o.h.) |
(1) At 2500 rpm, the CO content should not exceed 0.3%.
* When the coolant temperature is above 80°C after the engine has been running steadily at 2500 rpm for approximately 30 seconds.
**See country specific specifications for normative values.
The resistance values for the coolant temperature and intake air temperature sensors are given in Table 2.2. The sensors operate on the negative temperature coefficient principle.
Table 2.2. Resistance values for coolant temperature and intake air temperature sensors
| Temperature,°C | -10 | 25 | 50 | 80 | 110 |
| Air temperature sensor resistance, Ohm | 9529.2-9548.4 | 2045.3-2057.3 | 804.2-815.8 | 303.5-314.5 | 129.2-141.2 |
| Coolant temperature sensor resistance, Ohm | — | 2140-2364 | 770-850 | 275-291 | 112.4-117.6 |
Technical characteristics of the fuel injection system elements are given in Table 2.3.
Table 2.3. Technical characteristics of the fuel injection system elements
| Name | Brand/Type | Notes |
| Fuel injection control unit | Sagem "S 2000 RPM" | 112-pin wiring connector. Multi-point sequential injection |
| Static ignition | ||
| Throttle body 60mm (dual track potentiometer) | VDO | An electric motor that operates on direct current. Pin 1: Ground. Pin 2: Potentiometer signal, track 1. Pin 3: Motor power supply (-). Pin 4: Motor power supply (+). Pin 5: +5V supply. Pin 6: Potentiometer signal, track 2. Motor resistance: between pins 3 and 4: 1.57 ohms at 23°C. Resistance 1 = 1 kohms ±25%. Resistance 2 = 320 kohms ±20% |
| Accelerator pedal sensor | Hella | Dual track potentiometer. Resistance, track 1 = 1200±480 Ohm. Resistance, track 2 = 1700±680 Ohm |
| Ignition coils | Nippondenso | Four 4V coils. Coil primary resistance: approx. 0.5 ohm. Coil secondary resistance: 6.8 kOhm±1 kOhm |
| Spark plugs | Champion RC 8 PYCB | Tightening torque: 25-30 Nm |
| Pressure sensor | Delco | - |
| Knock sensor | Sagem | Piezoelectric. Tightening torque: 20 Nm |
| Magnetic sensor | Siemens | Variable resistance type. Resistance = 200-700 Ohm |
| Oxygen sensors (at the entrance and exit) | Bosch | Thermal resistance: 9 Ohm at 20°C. Internal resistance: 1 k Ohm. Rich mixture ＞ 800 mV. Lean mixture ＜ 50 mV |
| Fuel vapor absorber solenoid valve | Sagem | Resistance: 26±4 Ohm at 23°C |
| Nozzles | Magnetti-Marelli Pico | Resistance: 14.5±0.7 Ohm at 20°C |
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Air intake system
The location of the air intake system elements is shown in the figure 2.48.
Figure 2.48. Location of air intake system elements: 1- Air duct; 2 - Air intake; 3 - Air resonator; 4 - Air filter cover; 5 - Air filter cover mounting bolts; 6 - Air filter; 7 - Intake manifold; 8- Air flow distributor.
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