Diagnostic Manual, Engines, Volume 1
Engine 117.967/968 CFI
| Engine |
117.967/968 - Federal |
117.967/968 - California |
| CFI system designation |
3 |
3 |
On-off ratio/DTC readout (CFI)
On-off ratio readout with ignition: ON % |
70
|
85 |
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
Deceleration fuel shut off approx. mA
|
75
5 - 9; 1100 rpm/40 sec.
0
readout oscillates
>20
readout oscillates
4 - 6
-60 (Bosch control module)
-50 (VDO control module) |
75
5 - 9; 1100 rpm/40 sec.
0
readout oscillates
>20
readout oscillates
4 - 6
-60 (Bosch control module)
-50 (VDO control module) |
| Engine |
117.967/968 |
| CFI system designation |
3 |
Ignition timing and dwell
Engine speed rpm
Ignition timing with vacuum BTDC
Ignition timing without vacuum BTDC
Engine speed rpm
Ignition timing with vacuum BTDC
Ignition timing without vacuum BTDC
Dwell  °
Dwell % |
+100
650
-50
10 - 14
3 - 7
3500
40 - 44
24 - 28
27 - 40
60 - 89
|
| Engine |
Model |
MB Part No. |
Ignition adjustment ° CA |
Resistance  /k |
| 116.965 |
126 |
000 540 24 81 |
-6 |
750 |
| Note: If the reference resitor fails, then the igntion is retarded 3° at wide open throttle. |
| Engine |
117.967/968 |
| CFI system designation |
3 |
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
+100
650 <650
-50
700 - 1000 <700
95 |
Vacuum mbar
Lambda control ontrol range % |
550 - 650
3) |
3) Check on-off ratio at 2500 rpm and read mean value with the purge line disconnected and plugged.
Compare this value with the closed throttle speed value. The mean value at closed throttle speed must be higher by 5 but not more than 15.
From 1988 the mean value at closed throttle speed must not deviate from the value at 2500 rpm by more than ±10. |
| Engine |
117.967/968 |
| CFI system designation |
3 |
Engine performance 4)
Engine speed rpm
Output, 4-speed AT, transmission range 3 hp |
4800
180  |
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) |
|
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