Duramax losing fuel rail pressure problem ???? - Page 4 - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 05-06-2014, 11:56 AM   #76 (permalink)
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Quote:
Originally Posted by knaffie View Post
That's doing what GM should have done on these engines anyway.
These trucks should have had a lift pump from day one. Add a little bit of power, a little age and it's almost a must.
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Old 07-24-2015, 07:26 AM   #77 (permalink)
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Look guys this is not rocket science. After three of these trucks all doing the same thing it became apparent to me that with high mileage you get wear. The problem is the fuel system sucks on the Dmax. First thing you need to do is install the Cat dual filter with a lift pump. The cat filter is a 2 micron filtration system. Stock filter is 7 microns. Under 26,000 psi its like running a wet sandblaster through your fuel system mainly your injectors. After the filter install put in a clean set of new injectors. Problem solved
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Old 07-24-2015, 12:00 PM   #78 (permalink)
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Stock filter is 4micron with a coalescing water separator built in. Cat filter is also a good filter but has no water separator so you need the dual kit to get that function. IMHO the stock duramax filter setup is better than many. The bigger issue is that fuel in the US sucks, bare minimum cetane rating (unless your in CA) and bare minimum lubricity which is why additives for lubrication work so well to extend the life of the parts.
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Old 07-24-2015, 12:41 PM   #79 (permalink)
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Originally Posted by ironmangq:32672186
Stock filter is 4micron with a coalescing water separator built in. Cat filter is also a good filter but has no water separator so you need the dual kit to get that function. IMHO the stock duramax filter setup is better than many

It might be better than some but it still doesn't meet Bosch's filtering and water stripping standards
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