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Misfire monitor

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Old Feb 19, 2016 | 11:40 AM
  #41  
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For *hits and gigs, what plugs did you use? If they aren't copper or just really hot you could very easily have wasted time and money on something simple
 
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Old Feb 19, 2016 | 06:21 PM
  #42  
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The engine was put in last year so I know the compression is good.
 
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Old Feb 19, 2016 | 06:50 PM
  #43  
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I'm wondering vacuum leak or even computer
 
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Old Feb 20, 2016 | 07:44 PM
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So what it's doing is, when I first start it, it runs ok with the rpms higher and it starts to miss when it goes to idle. I don't feel it when I'm at higher rpms just the lower ones.
 
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Old Feb 21, 2016 | 10:30 AM
  #45  
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Still the original injectors?
 
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Old Feb 21, 2016 | 02:22 PM
  #46  
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Ya same part number
 
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Old Feb 21, 2016 | 07:53 PM
  #47  
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Ok so I hooked up my scan tool and I noticed it was staying at negative 10 fuel trim
 
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Old Feb 22, 2016 | 11:47 AM
  #48  
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So the PCM thinks the engine is running typically rich. How old is the O2 sensor?? and what brand?
 
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Old Feb 22, 2016 | 12:14 PM
  #49  
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Ya when I saw that and for kicks I unplugged the pcv and it ran like normal. I think it's ntk or ngk one of those and they are only a couple months.
 
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Old Feb 22, 2016 | 12:28 PM
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Did you block the vacuum line from the PCV? Or just leave the vacuum leak?
 
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