Dies when throttle falls

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Mar 9, 2015 | 10:07 AM

mmfarms

Thread Starter

Trailering

Joined: Feb 2008

Posts: 17

Likes: 1

Dies when throttle falls

My 7.3 has been sitting around for a year or so. I start it every now and then but don't drive it, as it isn't insured right now.

Recently I took it out and around the farm. I noticed when I let the throttle out the truck dies. If I ease it down it doesn't, but if you just let your foot off it does, like when shifting for example.

This was never an issue until I let it sit.

EDIT: I'm on an old account apparently. See Next post..

Mar 9, 2015 | 10:32 AM

deere55

Senior User

Joined: Aug 2009

Posts: 201

Likes: 1

From: Ohio

This is the same person.

The truck in question is the idi in my signature.

Sorry for any confusion.

EDIT: I just found this
https://www.ford-trucks.com/forums/1...d-problem.html
I'll try it. Shame on me for not looking first.

Mar 9, 2015 | 11:03 AM

Onus

Fleet Mechanic

Joined: Jun 2009

Posts: 1,320

Likes: 1

From: CT

Funny that we are both having the same problem at nearly the same time!

Mar 9, 2015 | 11:09 AM

tecgod13

Logistics Pro

Joined: Sep 2007

Posts: 3,739

Likes: 181

From: Western Mass

I had the same problem with '93 that I picked up last year and barely drove. When I started driving it this fall it did the dieing after letting off the pedal.
I pulled the fuel filter and filled it with ATF, let it run 30 seconds, then shut it off and let it sit overnight. It wasn't any better the next day when I started it, so just shut it off and let it sit another day. The next morning started it up and it has been fine ever since.

Mar 9, 2015 | 11:59 AM

mf7lakes

Cross-Country

Joined: Jan 2011

Posts: 73

Likes: 8

i think its air in system. fuel drains out after a period of time after sitting for several weeks. when engine throttle is suddenly retarded, engine dies. after driving stop and go for several miles, all lines are full and symptoms go away. at least this is true with my 7.3.

Mar 9, 2015 | 12:20 PM

tecgod13

Logistics Pro

Joined: Sep 2007

Posts: 3,739

Likes: 181

From: Western Mass

Air intrusion is a different problem that surfaces immediately after starting the truck, it stalls and takes like 10 seconds to restart, then runs fine the rest of the day.
The issue at hand happens anytime the truck is running, you're driving down the road at normal speeds, take your foot of the gas pedal, hit the clutch, RPMs drop all the way down as the engine dies. If you lightly remove your foot and slowly bring the RPMs to idle everything is fine.