Engine dies on decelaration
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Junior Member
Joined: Apr 2007
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Engine dies on decelaration
I have 97 4.6 liter F150 150,000 miles. Working just fine yesterday. Just got done changing oil and filter. I noticed the positive cable to the battery was a little corroded. So I pull the cable, clean the post with some sandpaper and the inside of the connector. Hook it all back up.
It starts fine, I put the truck in gear and go, but when I let my foot off the pedal, the engine gets all stupid on me and the rpm's go to practically zero and the truck dies.
For heaven sakes, I didn't do one other thing to it other than what I described. Totally lost. Any ideas? Thanks
It starts fine, I put the truck in gear and go, but when I let my foot off the pedal, the engine gets all stupid on me and the rpm's go to practically zero and the truck dies.
For heaven sakes, I didn't do one other thing to it other than what I described. Totally lost. Any ideas? Thanks
Senior Member
Joined: Jul 2004
Posts: 6,200
Likes: 39
From: Easton, Pa.
Power down rebooted the computer and cleared the "learned" data.
Drive it awhile and see if it settles down.
If not then begin looking for a cause.
Upon decelleration, the PCM shuts down the fuel to a low level because it's not needed.
The IAC is kept open just enough to keep the engine from dying.
There are other things that go on but this is the normal routine of things.
You might consider cleaning the IAC if it has a lot of miles on it.
Drive it awhile and see if it settles down.
If not then begin looking for a cause.
Upon decelleration, the PCM shuts down the fuel to a low level because it's not needed.
The IAC is kept open just enough to keep the engine from dying.
There are other things that go on but this is the normal routine of things.
You might consider cleaning the IAC if it has a lot of miles on it.
Thread Starter
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Junior Member
Joined: Apr 2007
Posts: 2
Likes: 0
Originally Posted by Bluegrass
Power down rebooted the computer and cleared the "learned" data.
Drive it awhile and see if it settles down.
If not then begin looking for a cause.
Upon decelleration, the PCM shuts down the fuel to a low level because it's not needed.
The IAC is kept open just enough to keep the engine from dying.
There are other things that go on but this is the normal routine of things.
You might consider cleaning the IAC if it has a lot of miles on it.
Drive it awhile and see if it settles down.
If not then begin looking for a cause.
Upon decelleration, the PCM shuts down the fuel to a low level because it's not needed.
The IAC is kept open just enough to keep the engine from dying.
There are other things that go on but this is the normal routine of things.
You might consider cleaning the IAC if it has a lot of miles on it.
That's exactly what the problem was. I let the truck idle for about 20 minutes this morning. Drove the truck to work (about 15 minute drive). Truck didn't stall one time. It came close but it's much better now. Thanks!
