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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

hooked up a vac guage. need help deciphering

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Old Nov 3, 2009 | 07:54 PM
  #61  
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Battery itself should be on the high side of 12v, closer to or even slightly over 13v.

If it has removable caps take them off and connect the charger, set it to 10amps, turn it on. You should see lots of small bubbles rising in each cell shortly after the charging has begun.
If one (or more) of then cells take a very long time to start bubbling, or you see very few bubbles say just one every few seconds/minutes, or you see no bubbles, the battery is shot.
 
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Old Nov 3, 2009 | 10:19 PM
  #62  
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no idea a bought the headlights on but with it running it stays at 13.8-14.5v

i am sure the Batt is gone going to get one this weekend. it was bought in jan of 2000 so it should be replaced any way
 
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Old Nov 4, 2009 | 09:08 AM
  #63  
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Originally Posted by 87Mater
it was bought in jan of 2000 so it should be replaced any way

ya think??????????
 
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Old Nov 4, 2009 | 06:10 PM
  #64  
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it wan't on the top of the list of things to change/fix

any way wile running with headlights on it still has 13.8-14.5v after a bit of a drop when they are first turned on
 
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Old Nov 4, 2009 | 06:20 PM
  #65  
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Just a hair shy of 9 years? no that battery don't owe you a nickel, time for a new one.

I've received long life from a couple batteries too, I don't buy cheap batteries to start with so that helps but no not 9 years out of one.

Until you replace it I'd hold off on further "trouble shooting" steps, a new battery it just may be the cure for what ails it.
 
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Old Nov 4, 2009 | 06:22 PM
  #66  
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i now have more respect for "Duralast" batteries.
 
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Old Nov 10, 2009 | 02:08 PM
  #67  
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ok new battery and i tested the alt for giggles the alt was fine

fuel pump stays running when it shuts off i stood by the rear tank and it stays on the entire time.

it is not consistent some times it will stay running all day long with no problem what so ever other tims it wount even start.

it can die at any time even when giving it throttle. it will just sputter

has a random miss that seems to move from cylander to cylander when it acts up




any more info ideas
 
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Old Nov 10, 2009 | 02:19 PM
  #68  
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you need a new computer.

the running fuel pump is a red flag for failed ecu/pcm.
 
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Old Nov 10, 2009 | 02:19 PM
  #69  
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If the fuel pump is staying on all the time then either the fuel pump relay is bad (I know you replaced it), the PCM is bad, or pin #6 in the diagnostic connector is being grounded somewhere. Have you taken a good look at that wire to see if it's rubbing against the frame somewhere?

You may be looking at a bad PCM.
 
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Old Nov 10, 2009 | 02:23 PM
  #70  
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when the truck stalls the fuel pump stops like 1 second after. i guess i was not clear enough. it's been a long day english not so good lol



i am close to just buy a new computer any way i replaced every thing elts almost.


also i tryed grounding pin sixs and it has never turnd the pump on so even if it wa grounded it wouldn't do any thing on my truck
 
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Old Nov 10, 2009 | 02:28 PM
  #71  
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Originally Posted by 87Mater
fuel pump stays running when it shuts off i stood by the rear tank and it stays on the entire time.
Originally Posted by 87Mater
when the truck stalls the fuel pump stops like 1 second after. i guess i was not clear enough.
Not at all - you were being perfectly clear. Part of the problem with this thread is your habit of saying one thing and then contradicting it in the next post. It's confusing as hell and it makes it nearly impossible for anyone to know what your truck's symptoms are. Without a clear understanding of the symptoms, it's impossible to figure out what's wrong so we can help you fix it. That's why this thread is so long.
 
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Old Nov 10, 2009 | 02:28 PM
  #72  
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when you turn the key on, engine off, does the fuel pump come on for a few seconds or does it keep running?
 
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Old Nov 10, 2009 | 02:29 PM
  #73  
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Originally Posted by andym
Not at all - you were being perfectly clear. Part of the problem with this thread is your habit of saying one thing and then contradicting it in the next post. It's confusing as hell and it makes it nearly impossible for anyone to know what your truck's symptoms are. Without a clear understanding of the symptoms, it's impossible to figure out what's wrong so we can help you fix it. That's why this thread is so long.
i have to agree with andy on this.
 
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Old Nov 10, 2009 | 02:32 PM
  #74  
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key on engine off the pump turns on for 2 seconds then shuts off.


there are no codes besides 82
 
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Old Nov 10, 2009 | 03:53 PM
  #75  
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found the problem or a new one

the fuel pump in the rear tank was dieing it finally fully died today. the front tank pump went a wile back.
 
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