Is this true?
Thread Starter
Senior Member
Joined: Jul 2010
Posts: 304
Likes: 6
From: Atlanta, GA
2016 E400 4Matic
Is this true?
I read this online today and wanted to know if this was really true? And if so, does it apply to the 08 E350?
Most fuel-injected engines today use computer-controlled Deceleration Fuel Cut Off: When you lift your foot from the gas while leaving the car in gear, injectors shut off automatically, and the car's rotating tires—which are connected to the engine via the transmission—keep the engine turning and the accessories running. So, the engine consumes no fuel at all while the vehicle is coasting downhill.
Most fuel-injected engines today use computer-controlled Deceleration Fuel Cut Off: When you lift your foot from the gas while leaving the car in gear, injectors shut off automatically, and the car's rotating tires—which are connected to the engine via the transmission—keep the engine turning and the accessories running. So, the engine consumes no fuel at all while the vehicle is coasting downhill.
Thread Starter
Senior Member
Joined: Jul 2010
Posts: 304
Likes: 6
From: Atlanta, GA
2016 E400 4Matic
So at what point to the fuel injectors kick in again? You certainly cant be stopped at a red light with your engine running and not using fuel. Do the injectors kick back in at 10mph, 5mph, 1mph, or when the car comes to a complete stop? Just curious.
MBWorld Fanatic!
Joined: Apr 2006
Posts: 2,139
Likes: 41
Tesla Model S P100D
I read this online today and wanted to know if this was really true? And if so, does it apply to the 08 E350?
Most fuel-injected engines today use computer-controlled Deceleration Fuel Cut Off: When you lift your foot from the gas while leaving the car in gear, injectors shut off automatically, and the car's rotating tires—which are connected to the engine via the transmission—keep the engine turning and the accessories running. So, the engine consumes no fuel at all while the vehicle is coasting downhill.
Most fuel-injected engines today use computer-controlled Deceleration Fuel Cut Off: When you lift your foot from the gas while leaving the car in gear, injectors shut off automatically, and the car's rotating tires—which are connected to the engine via the transmission—keep the engine turning and the accessories running. So, the engine consumes no fuel at all while the vehicle is coasting downhill.
Junior Member
Joined: Dec 2010
Posts: 57
Likes: 1
From: WMSBG, VA
1991 F-150, 1976 912E, 2006 E500 Wagon
This is not really a new feature:
it's been touted as an advantage of injection even back 60+ years ago.
In the early days of smog controls, some of the manufacturers tried to incorporate an idle circuit cut-off into carbeurators, too, but they were troublesome.
In the early days of smog controls, some of the manufacturers tried to incorporate an idle circuit cut-off into carbeurators, too, but they were troublesome.
Last edited by Ichabod; Jun 22, 2011 at 02:38 PM. Reason: Extra comment
