Lift pumps and BioDiesel

[Mr. C]

I have noticed that the factory lift pump on my Ram doesn't like Bio over an extended period of time. When I run B-100 it will only take a couple of weeks to start fluctuating on pressure and eventually quit all together. The odd thing is I can re-install one of the 4 lift pumps that have been in service on it before and that one will work perfectly for a couple weeks to a couple months and then it will act up again. I am not sure what is causing it but a period of rest seems to allow the pump to recover. It might be that the motor windings and brushes being submerged in the fuel have a component that is reacting to the Bio. I have run regular Diesel over the last 5 months and not had any problems with the pump on it now that was beginning to act up at the start of winter. Has anyone else noticed this and if so what pump have you used to replace yours that has an immunity to BoiDiesel, I don't want to go to the trouble of replacing mine with another that will just do the same thing.

 

[CrazieAbe]

I may be putting a nail in my coffiin here, but have you verified the pressure readings with another gauge? just a thought...

 

[Mr. C]

No nails... that is a legitimate question and yes I put a test gauge in the injection pump side of the filter canister just to be sure and they were the same.

 

[bigdaddydieseldan]

they are not meant to run on b100 the motors have to have a certain amount of regular diesel for the lubricating properties #@$%! #@$%! #@$%!

 

[Mr. C]

That's funny, I'll bet the big oil companies would take that as gospel. Mine has run very well on that evil biodiesel potion for thousands of miles.

 

[CrazieAbe]

is the fluctuation pre filter?

 

[SHobbs]

they are not meant to run on b100 the motors have to have a certain amount of regular diesel for the lubricating properties #@$%! #@$%! #@$%!

My pressure is the same running diesel as it is running B100. Seeing what little sulphur is in the ULSD you'd be doing yourself a favor using bio no matter what the percentage is.