Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Why does my car consume fuel even when coasting (09 Accord I4 automatic)

jayliu1984 · 05-17-2013, 04:56 PM

My car, the 2009 I4 Accord Automatic, consumes fuel from 0.9L/h to 1.4L/h (seems mainly depend on tempereature) no matter if I am parked idling, or coasting at 35mph or coasting at 65mph.

Even if I am coasting, gaining speed on a down slope in gear, it will still consume whatever it consumes when idling.

The car goes to 5th gear at about 35mph, and I can tell that when it is coasting at 5th gear, the RPM stays with speed, which means the engine IS engaged. But it is still consuming fuel!

I thought modern fuel injected engine does not consume fuel when coasting.

This kinda of upsets me because I coast considerably shorter distance in gear, and I can't even rip the benefit of no fuel injected.

05-17-2013, 04:56 PM	#1 (permalink)
jayliu1984 EcoModding Lurker Join Date: Mar 2013 Location: vacouver, Canada Posts: 29 Thanks: 0 Thanked 1 Time in 1 Post	Why does my car consume fuel even when coasting (09 Accord I4 automatic) My car, the 2009 I4 Accord Automatic, consumes fuel from 0.9L/h to 1.4L/h (seems mainly depend on tempereature) no matter if I am parked idling, or coasting at 35mph or coasting at 65mph. Even if I am coasting, gaining speed on a down slope in gear, it will still consume whatever it consumes when idling. The car goes to 5th gear at about 35mph, and I can tell that when it is coasting at 5th gear, the RPM stays with speed, which means the engine IS engaged. But it is still consuming fuel! I thought modern fuel injected engine does not consume fuel when coasting. This kinda of upsets me because I coast considerably shorter distance in gear, and I can't even rip the benefit of no fuel injected.