Well that answerEd everything but the question!
The torque converter clutch locks which causes the wheels to continue driving the engine despite there being no fuel while coasting. The engine isn’t making any power, but it’s not “shut down” since the ECU is still in full control of it. Some manufacturers use a “lean cruise” mode, but that’s while cruising at speed.The engine will shut down if the ECU shuts off all gas to the engine. What happens, at least in BMWs, is the ECU (DME in BMWspeak) runs a very lean mixture, usually about 16.5:1 air/fuel mix. The optimal mix is 14.6:1 air/fuel mix by mass.
I will ask when said manual was written, lmao? 50 yrs ago as few things are revised for modern usability.It is against the law. do you have a drivers license? Reread the drivers license manual.
My car has a manual transmission.The torque converter clutch locks which causes the wheels to continue driving the engine despite there being no fuel while coasting. The engine isn’t making any power, but it’s not “shut down” since the ECU is still in full control of it. Some manufacturers use a “lean cruise” mode, but that’s while cruising at speed.
With a manual transmission, the engine continues to use a small amount of fuel (whatever is required to keep the engine idling) when coasting in N.
When coasting in gear, the fuel injectors actually shut off, and the car uses no fuel at all.
Drop a manual transmission into neutral and release the gas, and your engine automatically returns to idle, where the injectors must pulse to keep it running. Worse mpg than leaving it in gear.
That's why you pull the driveshaft to flat-tow or dolly a RWD automatic vehicle. I guess the pump would work if the engine is running, but that could depend on the specific model.Also, in some cars, the oil pump in the trans won’t spin in N, and you’ll maybe grenade it if there’s a lack of lubricant.
I think most do, as for some vehicles you can flat tow them with the engine running in N.Does the auto trans lube when coasting in N?
In general terms, if the engine is running, yes. The pump is driven by the rotating converter.Does the auto trans lube when coasting in N?
Any idea if 1980s ECU does this too ?As stated before several times: Modern fuel injected cars completely SHUT OFF fuel delivery when coasting in gear. Going to neutral and forcing the engine to idle ADDS fuel to That downhill trip. You may add speed in neutral but you don’t save gas.
No ideaAny idea if 1980s ECU does this too ?