Truck left me stranded a couple days ago, P0628 code so I replaced the stock lift pump with a FASS.

Yesterday I looked at the old pump on the workbench, found I could blow through it. Hooked up 12v to the connections and it ran.

Are there intermittant problems with these? I hope the FASS is the cure, I sure don't want to be stranded again!

Truck is an 04.

 

Could broken regulator - could be bad brushes - could be intermittent connection in the electrical plug due to oxidation\corrosion - sometimes just R&R'ing the plug cleans the pins and restores connection - you'd need to disassemble the pump to determine actual failure

Did you just blow thru it, or use shop air?

If you used the FASS with two filters, you should be good to go for many years - just service the filters, paying close attention to the pre-filter -that one protects the FASS pump

 

I was able to just blow through it.

How do you take the pump apart? Looks like it's a sealed body?

 

Just get rude and cut it open.

I discovered that my second lift pump (the one that Dodge put in under warrantee) with only about 10,000 miles on it (and still working fine) had severely worn brushes. The pump section looked fine and seemd well made. A roller vane type pump, it looked like it would run for years.

The motor looks like it belongs in an electric shaver or a slot car.

I could not blow through mine and it was not clogged. It was working fine when I removed it. Maybe one of the types of failures they are capable of allows them to be blown through but others do not.

If they were easy to blow through when failed the CP3 should be able to suck through them. One of the "get home" fixes I've heard about is to plumb around the lift pump and filter housing with a temporary line and in-line filter. Then the CP3 can pump the fuel from the tank itself.

It's just really important to get the stock pumps out of there.

John

 

You'll need to hacksaw it, or use a grinder on the crimped area holding the pump to the motor shell - carefully cut or grind around the outer diameter of the crimp till you can see the pump casting thru the resulting crack - well, that's how I would do it - there are v-type band clamps that could be used to salvage that pump, if so desired - you could also just hacksaw thru the round motor shell just below the crimp, being careful not to install any damage - that would defeat the purpose of the recon mission

The later trucks may have a revised totally sealed pump - not real sure how to get into one of those without initial damage, tho