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Rough idle on the 6.0

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Old Feb 17, 2024 | 10:21 AM
  #31  
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Originally Posted by carfixer007
The RoT is IPW will be about the same as the displacement. A 6L engine should be about 6ms IPW.
I was wrong. It'* grams/sec of airflow and not IPW
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Old Feb 17, 2024 | 10:27 AM
  #32  
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ya that makes sense. usually rule of thumb for mass airflow is 1g/sec for every liter of displacement at idle if I am not wrong. I think ipw is so low bc these are pretty big injectors for a normal vehicle and its a big motor
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Old Feb 17, 2024 | 10:43 AM
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I'm not sure that you IPW is not right where it should be. The trims agree. I couldn't find the scan tool data at idle to compare.
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Old Feb 17, 2024 | 01:50 PM
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ya i think my ipw'* are good, maf seems a tiny bit high and map seems a bit low. The bank 1 valve cover is the crankcase ventilation cover, it was defective and allowed oil into the intake manifold. I am thinking maybe the map needs to be cleaned up
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Old Feb 20, 2024 | 11:05 AM
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Okay update...

My ltft for bank 1 is still at +-0
my ltft for bank 2 is still at +2

the vehicle was idling pretty rough now that it is starting to get warm. I am stumped beyond understanding on this one.

Could this be an ignition component or a dirty sensor? I pretty much have to pull the IM to get to the map sensor
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Old Feb 21, 2024 | 12:03 AM
  #36  
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I forget: Have we seen fuel pressure from a real fuel pressure gauge yet?
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Old Feb 21, 2024 | 08:53 AM
  #37  
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no I just assumed bad fuel pressure would result in bad fuel trims, I have the fuel pressure gauge now so I will try to test it today
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Old Feb 21, 2024 | 11:07 PM
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Cool, looking forward to it!
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Old Feb 22, 2024 | 10:37 AM
  #39  
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Well at this point I dont have a clue what to think, seems like its at 57-59psi just priming and with the vehicle on...

I have heard the L96 is an absolute workhorse of an engine and its just a little bit of a rough idle which is more normal on OHV engines versus SOHC/DOHC

Do I just send it and hope for the best?
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Old Feb 22, 2024 | 11:35 PM
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How about when the weirdness happens?
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