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LOCATION:    A CFI Test and Adjustment Data    >   25 Engine 104.980/981 CFI from start of production


Engine 104.980/981 CFI from start of production

Engine 104.980/981
CFI system designation 5.2
On-off ratio/DTC readout (CFI)
On-off ratio readout with ignition: ON
Engine coolant temperature >80°C %
Engine coolant temperature <70°C %
DTC readout, engine at closed throttle


50
30
1 1)
Current at EHA
Ignition: ON mA
After start enrichment and warmup
After start enrichment at +20 °C engine coolant temperature mA
Warmup base value at+20°C engine coolant temperature mA
Engine coolant temperature +80°C mA
Enrichment during acceleration and at
+20°C engine coolant temperature mA
Engine at operating temperature
Part load mixture correction mA
Wide open throttle enrichment at 2000 rpm mA
Deceleration fuel shut off approx. mA

20

1 - 3; >0 to <8 sec.
0 - 1; >12 to 120 sec.
readout oscillates

>15

readout oscillates
2 - 4
-40
1) For test conditions refer to Diagnostic Manual, Engine Vol. 2.

Engine 104.980/981
CFI system designation 5.2
Ignition timing and dwell
Engine speed rpm
Ignition timing with vacuum BTDC

Engine speed rpm
Ignition timing with vacuum BTDC
Ignition timing without vacuum BTDC
Dwell °
Dwell %

650-750
6 - 10

3200
34 - 38
21 - 25
24 - 53
40 - 88

Engine Model MB Part No. Ignition adjustment ° CA Resistance /k
104.980/981 124/129 015 545 67 28 0 2.4 k
Note: If the reference resitor fails, then the igntion is retarded 3° at wide open throttle.

 
Engine 104.980/981
CFI system designation 5.2
Closed throttle ( idle)
Selector lever position/Transmission range
Engine oil temperature °C approx.
Closed throttle (idle) speed rpm
Control range mA

On-off ratio readout during deceleration fuel shut-off %

P/N D
80 80
650 - 750 <700
600±50 <600

95
Engine coolant temperature °C
Closed throttle warm-up speed rpm
Engine coolant temperature °C
Closed throttle warm-up speed rpm
-30 to +25
1100±30
>+25 to +80
declines continuously
to 700±50
Vacuum mbar
Lambda control ontrol range %
500 - 650
50±20 2)
2) This value must be measured at idle and at 2500 rpm with the purge line disconnected and plugged.

Engine 104.980/981
CFI system designation 5.2
Engine systems control module (ESCM)

Cut off speed rpm
Kickdown, automatic transmission rpm


7000±50
6700±50
Engine performance 4)

Engine speed rpm
Output, manual transmission, 3rd gear, Model 129 hp
Output, 4-speed AT, transmission range 3, Model 124 hp
Output, 5-speed AT, transmission range 3, Model 129 hp


5500
176
158
166
4) These are minimum performance values. Do not exceed speed of 80 mph.
Check performance only at simulated engine coolant temperature of 80 oC (use 2 resistance substitution units)