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| [[Category:Fuel System]] | [[Category:Fuel System]] | ||
| - | The [[Fuel Shut-Off System]] was introduced in 1981 B310 USA models. It leverages the [[anti-diesel valve]] to stop the fuel flow during periods of deceleration. This is similar to what EFI systems do. It is only active at higher speeds, namely above 40mph. | + | The [[Fuel Shut-Off System]] was introduced in some 1980 B310 USA models. It leverages the [[anti-diesel valve]] to stop the fuel flow during periods of deceleration. This is similar to what EFI systems do. It is only active at higher speeds, namely above 40mph. |
| - | FSOS was used by CAL, FED, FED.MPG and CAN.MPG models. Canada models did not use fuel-shut off except for MPG ([[FU Engine]]) models. | + | 1980: All California models |
| + | 1980: FED A15.MT | ||
| + | 1981 CAL, FED, FED.MPG and CAN.MPG models. | ||
| + | Canada models did not use fuel-shut off except for | ||
| + | MPG ([[FU Engine]]) models. | ||
| For safety and good performance, the FSOS does not work unless the engine is decelerating. | For safety and good performance, the FSOS does not work unless the engine is decelerating. | ||
Revision as of 12:53, 13 January 2012
The Fuel Shut-Off System was introduced in some 1980 B310 USA models. It leverages the anti-diesel valve to stop the fuel flow during periods of deceleration. This is similar to what EFI systems do. It is only active at higher speeds, namely above 40mph.
1980: All California models 1980: FED A15.MT 1981 CAL, FED, FED.MPG and CAN.MPG models. Canada models did not use fuel-shut off except for MPG (FU Engine) models.
For safety and good performance, the FSOS does not work unless the engine is decelerating.
- Only works when decelerating (vacuum is high AND speed above 40mph)
- Does not work in nuetral, so engine will not stop due to lack of fuel
- Does not work when clutch is engaged (so you can blip the throttle)
Components are:
- Anti-diesel valve (solenoid)
- Vacuum valve
- Speedometer speed switch, amplifier and relay
- Also used by CAL Mixture Ratio Rich-Lean Exchange System
- Automatic Transmission inhibitor switch
- Manual Transmission nuetral switch
- Clutch pedal switch
This would be an interesting system to retrofit to older models for increased fuel economy.