Should be able to read it with the appropriate software then. Anyone want to show us the data with the tank full and also with it almost empty?
Fuel Pump Overheating: Fact or Fiction?
- Thread starter Shel_B
- Start date
Ya, stupid diesels.
This is why when the HPFP fails on BMWs, we have to replace EVERYTHING the fuel touches. Right from the tank to the injectors.
I have to fill up today so I'll try to get some info. I won't run it below a quarter tank though.
Same. I think the system could be cleaned properly, but it would be too labor intensive for a shop and would end up costing more.Ya, stupid diesels.
This is why when the HPFP fails on BMWs, we have to replace EVERYTHING the fuel touches. Right from the tank to the injectors.
For a customer performing his/her own repairs, I think it is doable.
I've used the fuel pump to pump down tanks and anything past an 1/8 of a tank is also pumping air.
That being said I run mine to empty every time. Maybe it's the people who only put a couple twenty bucks in at a time?
Electric fuel pumps are lubricated and kept cool in the fuel tanks. Fuel tanks are less likely to heat up unless in rare condition you park on a surface that is already exceeding 160f+ radiated heat. Running a fuel tank for long periods often bellow 1/4 effect the life of fuel pumps and also other fuel supply parts.
I hate dead head systems and often convert to live to run a cooler fuel to the injectors .
I hate dead head systems and often convert to live to run a cooler fuel to the injectors .
I put 200k miles on my vehicle with a tank mounted pump, and never knew of this until recently. I'd say probably 50% of those miles were under 1/4 tank, and at least 100 times I was driving with less than 1-2 gallons. A few times I coasted into the gas station on fumes. I never had a fuel pump failure on this (or any other) vehicle.
But since I've learned of this, I do keep at least 1/4 tank in my tanks. And there's generally smart reasoning to do so anyway.
But since I've learned of this, I do keep at least 1/4 tank in my tanks. And there's generally smart reasoning to do so anyway.
What is a "dead head" system? How is it converted to a live system?
No that heats it.
Just do a quick google search:
I'd almost bet there's little to no difference. The only exception I'm aware of are some
Diesel cars that have a return line (e.g. Pumpedüse), but these use to come along with a
underbottom mounted Diesel fuel kind of radiator/heat sink.
I use to fill up when I have a remaining range between 50 and 100 km left, with the only
exception being on track. Slicks or semislicks along with high-µ pavement makes for high
g forces up to 1.5 g and that's why it's better having at least 25 % in the tank. Never had
any issues with fuel supply or a fuel pump on street. It's the last thing I'd worry about.
.
Before filling, after sitting for 4 hours after my 35 mile commute, then the lowest the temp fell after filling with 24 gallons. (~5mi), then the ending temp after the remains 30 miles home.
I'll do it again tomorrow from ambient.
On a cell will explain tomorrow when I get my new computer. My hard drive just failed an hour ago. So I had to remove the hardrive and pull my info for the new computer. It was its time after 5 years anyway.
Simply a non-return system where the fuel goes from pump to injectors and that's where it stops. Most cars use a system where the fuel goes from pump, to injectors, to a fuel pressure regulator which bypasses fuel back to the tank in order to maintain pressure. This requires 2 hoses, one up and one back.
The fuel pump relies on surrounding fuel to keep it cool in operation. Run it low, it's above the level of the fuel, starts getting hot, prone to excessive wear or even seizing. It doesn't cost any more to just keep the tank full, or close. Less condensation in the tank that way too!
If you are getting condensation in the tank, you have bigger issues. It is a sealed system.
Not in diesels-many of the issues we had with diesels were caused by running them low & freezing fuel lines or growing fungus in the tank. Fuel gets hot from return fuel or ambient temps, cools overnight-how does the tank not collapse? Most fuel systems have a one-way valve somewhere, to allow air IN.
Don't tell my fuel pump, at 110k and 8 years of running until the fuel gauge is pegged to the stop it's still fine.
Diesel tanks are vented, no valves.
I only run my cars with mechanical pumps low on fuel. When I worked in the auto service industry it seemed like almost every fuel pump failure was either on an almost empty tank or 100% full as they just filled it up. I was told it often happened immediately when the cold fuel hit the overheated pump.
If I do end up below 1/4 with my truck I try to corner more gently as that's when the pump supposedly ends up uncovered and overheating.
the pumps sit in a bucket where the return/excess fuel is dumped....
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