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Intermittent slight rough idle when hot and restarted(intermittent acceleration)

Old Nov 10, 2025 | 07:32 PM
  #31  
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I took the snorkel off and smoked it again and it is coming directly out where my finger is pointing. I put the snorkel back on and smoked it some more. It is coming out underneath right at seal of the snorkel. Also here are the fuel trims at idle when warm, they are staying at around + or - 5%.



 

Last edited by zupta82; Nov 11, 2025 at 06:04 PM. Reason: Forgot information
Old Nov 12, 2025 | 05:24 PM
  #32  
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I am attaching graphs of the fuel trims at idle when engine warmed up



 
Old Nov 12, 2025 | 07:11 PM
  #33  
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Originally Posted by zupta82
I took the snorkel off and smoked it again and it is coming directly out where my finger is pointing. I put the snorkel back on and smoked it some more. It is coming out underneath right at seal of the snorkel. Also here are the fuel trims at idle when warm, they are staying at around + or - 5%.


Those FT values are good but you only show bank 1. What does bank 2 look like? That snorkel seal leak will cause unmetered air to enter the intake but it must not be a significant leak because it would make the fuel trims go positive.

George
 
Old Nov 13, 2025 | 09:10 AM
  #34  
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It must of not attached, here it is again

 
Old Nov 13, 2025 | 09:13 AM
  #35  
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Graphing has its place but on fuel trims we just need the values like the screen shot on bank 1.

George
 
Old Nov 13, 2025 | 06:51 PM
  #36  
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Okay here is bank 2 at idle when warm
 
Old Nov 13, 2025 | 10:24 PM
  #37  
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Your fuel trims are typical for an engine of this age and the values are negative which means that the computer is reducing fuel delivery based on a perceived rich condition, the opposite of any unmetered air/vacuum leak.

George
 
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