unhooking battery to reprogram , why
Thread Starter
|
Senior User
Joined: Apr 2004
Posts: 291
Likes: 0
From: mt
unhooking battery to reprogram , why
I have heard that unhooking the battery every so often will help the computer. I have a 99 f250 with a v10. its completely stock with 63000 miles on it. How long should the battery be unhooked. and what will it do thanks
Postmaster
Joined: Jan 2003
Posts: 4,417
Likes: 3
From: Durham, NC
First, welcome to FTE!!!!!
I've never heard the term "helping the computer" before, but unhooking the battery is a way of resetting error codes that may have been set, throwing a CEL (Check Engine Light). There is a memory in the computer (PCM) that is always powered (even with the key off), and can be reset
by unhooking the negative battery terminal, turning on the
headlight switch, and waiting 10-15 minutes...
I've never heard the term "helping the computer" before, but unhooking the battery is a way of resetting error codes that may have been set, throwing a CEL (Check Engine Light). There is a memory in the computer (PCM) that is always powered (even with the key off), and can be reset
by unhooking the negative battery terminal, turning on the
headlight switch, and waiting 10-15 minutes...
Mountain Pass
Joined: Jan 2003
Posts: 161
Likes: 1
There are those who believe that resetting the PCM will force the system to "relearn" timing curves, etc. 
While this is true, it does this all the time anyway, and resetting it does nothing to help performance. The only reason you would want to reset it would be to clear an error code like Bob said. I've never seen a need to turn on the headlight switch, though.
While this is true, it does this all the time anyway, and resetting it does nothing to help performance. The only reason you would want to reset it would be to clear an error code like Bob said. I've never seen a need to turn on the headlight switch, though.
Postmaster
Joined: Jan 2003
Posts: 4,417
Likes: 3
From: Durham, NC
Originally Posted by jcrice
There are those who believe that resetting the PCM will force the system to "relearn" timing curves, etc. While this is true, it does this all the time anyway, and resetting it does nothing to help performance. The only reason you would want to reset it would be to clear an error code like Bob said. I've never seen a need to turn on the headlight switch, though.
While this is true, it does this all the time anyway, and resetting it does nothing to help performance. The only reason you would want to reset it would be to clear an error code like Bob said. I've never seen a need to turn on the headlight switch, though.
Thread
Thread Starter
Forum
Replies
Last Post
AirTran
Audio & Video Systems, Navigation, Satellite Radio & Mobile Electronics
4
Nov 28, 2005 10:26 AM
ss10
Clutch, Transmission, Differential, Axle & Transfer Case
9
Sep 30, 2004 09:35 PM
