Duramax Diesels Forum Truck of the Week
  #121  
Old 02-14-2017, 08:24 AM
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S Phinney S Phinney is offline
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Stock lb7 flow 1080 ml/min LML flow 880 ml/min. That is a static number. Now in a assembled form lml injectors do flow more fuel. It is because if their design and function that allows that.


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  #122  
Old 02-14-2017, 12:07 PM
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Was it determined what a 45% sac is to a VCO?
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  #123  
Old 02-15-2017, 09:52 PM
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Originally Posted by bigmackmiller View Post
Was it determined what a 45% sac is to a VCO?
Where at? At idle I have found they flow slightly less fuel than a stock vco, but that quickly changes as pressure goes beyond 40mpa. I only have the basic flow sheet on a set which says at 160mpa and a 1700 pw, they should flow in the 165-168 mm3 of fuel(I want to say stock lb7's were in the 120 range at the same pressure and pulse).
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  #124  
Old 02-17-2017, 04:01 AM
elcaminonut69 elcaminonut69 is offline
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I have been double dosing my Suburban with Opti-Lube XPD and the smoking is pretty much gone but the smell is still there. Someone please correct me if I'm wrong blue smoke at idle is leaking tip and hard or no start when warm is the injector returning to much fuel pass the ball and seat. I have never had a hard start problem just the blue smoke. My Bosch reman injectors were installed at 168,000 and I now have 232,000. Way to soon to put out another $3000 plus on parts. These injectors were installed in October of 2015. My better judgement says to put new injectors in with the SAC nozzles but I think I'm going to just do nozzles as I am curious . I know it would be a lot of extra work if I have to pull them back out. Might do a return test while I'm in there to make sure.
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  #125  
Old 02-17-2017, 08:41 PM
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Quote:
Originally Posted by elcaminonut69 View Post
I have been double dosing my Suburban with Opti-Lube XPD and the smoking is pretty much gone but the smell is still there. Someone please correct me if I'm wrong blue smoke at idle is leaking tip and hard or no start when warm is the injector returning to much fuel pass the ball and seat. I have never had a hard start problem just the blue smoke. My Bosch reman injectors were installed at 168,000 and I now have 232,000. Way to soon to put out another $3000 plus on parts. These injectors were installed in October of 2015. My better judgement says to put new injectors in with the SAC nozzles but I think I'm going to just do nozzles as I am curious . I know it would be a lot of extra work if I have to pull them back out. Might do a return test while I'm in there to make sure.
Yes, bad nozzles can cause blue smoke from a diesel. High return rates can cause a hard or no start as well as a hung injector staying open. I started to roll the dice on nozzles as mine had 71K miles on them, but in the end I opted for complete units as I know 99% of the shops out there don't have the equipment to balance them, and I wanted to make sure they were as close as possible. And at $1K for a set of SAC nozzles, they would have been an EXPENSIVE gamble.
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  #126  
Old 02-17-2017, 09:08 PM
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Mine has a horrid eye watering diesel smell and it's been hazing bad at idle, like you can see it plain as day, so I'm guessing I'm gonna be due for injectors soon?? Truck has 95k on it.
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