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sputter hot start

  #1  
Old 07-19-2013, 05:06 PM
brokeasajoke
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sputter hot start

1996 f150. When hot it acts like its flooding. Will hit on a couple of cylinders and i hold it wide open and will usually pick up 4cyls and i can drive it where within a mile or 2 it clears completly out. Latey it has been losing one cyl till it completely cools off after which it starts just fine. Do i have injectors sticking open with the heat. ? Definately worse in summer. I can usually spray a little ether and get it to clean out at its worse but today that didnt work. If i dont turn it off its fine but sure as i do when its hot and let it set for more than 5min or so rough start or complete flood like today.
 
  #2  
Old 07-19-2013, 05:21 PM
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I had a fuel pump relay go north in my old Honda and it acted the same way. Pull the computer codes before you do anything else. Self diagnostics are a wonderful thing.
 
  #3  
Old 07-19-2013, 05:35 PM
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Been doing this for a couple years now progressively getting worse
 
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Old 07-19-2013, 09:22 PM
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That's the exact thing that happened to me with leaking injectors, but they would clear up in a few minutes.
If started immediately after a hot shutdown, it was okay.
It would blow black smoke out the exhaust when it was happening. That shows it was leaking gas.
No codes.
 
  #5  
Old 07-19-2013, 09:28 PM
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Im pretty sure they are leaking down. Sometimes ita so flooded it wont light without ether. Like today.
 
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Old 07-19-2013, 09:52 PM
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Let it cool off since 3 oclockand just fired right up perfect jus now.
 
  #7  
Old 07-19-2013, 10:07 PM
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Does seem to do a little better when i put a qt of atf in tank. I guess its just time for injectors or at the least rob an injector rail at parts yard.
 
  #8  
Old 07-25-2013, 02:11 PM
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Isnt there a feature on these trucks that disables the fuel pump on a hot start to keep from flooding? Could I retard the timing just a little to help on hot start ? If it runs on ether then dies seems its a fuel.delivery problem too. Done it again today. 3 hours later fired up like nothing happened.
 
  #9  
Old 07-25-2013, 02:16 PM
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Vapor locking too??
 
  #10  
Old 07-28-2013, 11:03 PM
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Per BVA: "Pull the computer codes before you do anything else."
 
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