Got a 2002 cummins that's getting fuel in my engine oil. Put new injectors in and ran for 200 miles and it's doing it again. I've put dye in the fuel and let it idle but I cannot see where's it's leaking. Any thoughts?

  On 1/7/2014 at 3:24 PM, Ilikeoldfords said:

Do you mean 20 PSI of lift pump pressure? I just want to clarify is all, thanks.

 

Yes sir. 14-20 PSI is a good normal range of operation. Basically give you a 6 PSI swing area for fuel pressure drop. There is absolutely no reason to exceed 20 PSI it doesn't improve performance nor does it keep the pump lubed or cooled better being the return line is smaller than the supply line.