I was just thinking today about the foam diesel fuel makes when it is being transfered from the pump to our tanks. Wouldnt it go without saying that it is also getting foamed up going through our fuel systems, cutting down on actual volumn and effiency in the motor? Does anyone make an anti-foam for diesel fuel? Wouldnt cutting the foam in the system make more power and mileage? Also wouldnt eliminating the foam be better for the pumps lubrication and cooling?

Or am I just foaming at the mouth?

 

the fuel system is a pressurized, fully contained system, no place for the foam to develop, heck when the fuel leaves the pump and goes toward the injectors its at somthing like 1800 psi. NO FOAM THERE!

 

 

I don't know if it was due to a bad pump or fuel foaming, but I had fuel overflow the other day when filling up. I usually put it on high flow for most of the tank and then put it on low for the last few gallons, but there were people waiting so I left it on high. The station operator said that it happens from time to time, and just dumped a bucket of soapy water on the spilled fuel. I used a couple of applications ot tire cleaner and warm water on the side of the truck, the rear tire, on the inside of the body below the fuel cap, and around the fuel cap. The tie cleaner worked well as it was a heavy duty detergent.

 

How about 1600bar which is around 20,000psi.

There is a test for the fuel tank that strictly would forbid a fuel tank from spitting out fuel from going into production. Either there is something wrong with your tank or the fuel station has something wrong with their pump. From your description, it sounds like something is wrong with their pump. I would suggest that if you ever refuel somewhere else, try leaving the pump on "high" and see if it still overflows before it shuts off. I bet it won't overflow.

 

Here's a related thread from the general forum:
https://www.dieseltruckresource.com/...threadid=40591

 

Nope, if it was foaming in the system, youd have a load of air and they don't like air. IT enters the lift pump in it's full liquid state and from there it is squeezed and pressurized, what doesn't enter the injectors goes back in the tank.

Air is bad, only foams when refueling. Don't even give it a second thought.