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| - | [[Category:Fuel System]] | ||
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| 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. | 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. | ||
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| * 32006-K2401 SWITCH COMP-NEUTRAL COUPE 5-SPEED(CAL),FED KFU [Neutral Detecting Switch] replaced 32130-H9705 32006-K2400 | * 32006-K2401 SWITCH COMP-NEUTRAL COUPE 5-SPEED(CAL),FED KFU [Neutral Detecting Switch] replaced 32130-H9705 32006-K2400 | ||
| * 10mph switch in speedometer | * 10mph switch in speedometer | ||
| + | |||
| + | = Coasting Cut-off = | ||
| + | Nissan intoduced a similar system for 1968 USA Datsun models 510, 520-TU and SRL311-U/SPL311-U. Call "coasting cut-off", it's main purpose was to reduce unburned hydrocarbons on decelleration. It is described in Nissan "Service Bulletin Vol. 79" | ||
| + | |||
| + | COASTING CUT-OFF PARTS | ||
| + | 16010-20610 Hitachi carburetor DCA306-4 | ||
| + | * with magnetic valve and accelerator switch | ||
| + | 16328-20600 Vacuum Switch (VS37-1) | ||
| + | |||
| + | The carburetor contains "Solenoid Valve (24D)" and a bolt-on micro-switch "Throttle Switch" and bracket. The solenoid looks like a fat version of an [[Anti-diesel Valve]]. | ||
| + | |||
| + | [[Category:Fuel System]] | ||
Revision as of 05:15, 8 April 2014
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 neutral, 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 Neutral Switch
- Clutch pedal switch
This would be an interesting system to retrofit to older models for increased fuel economy.
Fuel Shut-Off System replaces Throttle Opener.
- Hitach DCH306-67
- Dual-mode spark advance (intake vacuum works at idle, improving fuel economy)
- Double-lead anti-diesel valve
- 16767-H7280 UNIT-ENGINE REVOLUTION A14 FED(KFU) B310 [Engine Rev Switch, 1000-1150 RPM)
- 16024-H7281 THROTTLE SWITCH ASSY A14 FED(KFU) B310 [Throttle Valve Switch]
- 32130-H9011/32130-H9010 EXTENSION ASSY-REAR [unique, but others may work]
- 32006-K2401 SWITCH COMP-NEUTRAL COUPE 5-SPEED(CAL),FED KFU [Neutral Detecting Switch] replaced 32130-H9705 32006-K2400
- 10mph switch in speedometer
Coasting Cut-off
Nissan intoduced a similar system for 1968 USA Datsun models 510, 520-TU and SRL311-U/SPL311-U. Call "coasting cut-off", it's main purpose was to reduce unburned hydrocarbons on decelleration. It is described in Nissan "Service Bulletin Vol. 79"
COASTING CUT-OFF PARTS 16010-20610 Hitachi carburetor DCA306-4 * with magnetic valve and accelerator switch 16328-20600 Vacuum Switch (VS37-1)
The carburetor contains "Solenoid Valve (24D)" and a bolt-on micro-switch "Throttle Switch" and bracket. The solenoid looks like a fat version of an Anti-diesel Valve.