Decel fuel shutoff
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New User
Joined: Nov 2009
Posts: 16
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Well I have a 2000, with 4.0, 4wd, off road package. Now to the problem, with the transmission out of overdrive, in 4th gear, and you let off the gas, at approx 1500 rpms it just slows down like really quick. It will drop down to like 800 very fast. It's just like a jake brake on a truck. I read a posting over in ranger station that a guy had the same problem. The replies were about a decel fuel shutoff that all fords with efi have it. It really does bother you when you are slowing down.
Laughing Gas
Joined: Aug 2003
Posts: 1,175
Likes: 9
From: So. Cal.
Charlie268, When you take the truck out of overdrive, the torque converter locks, and thus it acts somewhat like a stick shift when you let off the gas. That is, the vehicle will have engine braking and DFCO will become active more easily. This is completely normal and it's the way it's supposed to function. But I've never seen it continue until down to 800 rpm. I would expect that to produce stalling problems. If you want coasting, leave the overdrive engaged.
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