Fuel cut out on long corners

[christsay]

Still waiting on the PN

533 201511a

http://www.rmeuropean.com/Part-Number/Fuel-Filter-for-Fuel-Expansion-Tank-__533201511A_GEN_A58C52C.aspx

$15 at rmeuro.

-chris

[einstein57]

Still waiting on the PN

[JakeP]

I have a good working fuel pump (one pump system) and get this problem. I know you can buy foam from a fuel cell company like Fuel Safe and just throw it in the tank.... I'll help, but not fix the problem.

[JGood]

This is in an early car setup? You're suggesting just replacing the in-tank pump, as it may be dead? Does that require dropping out the fuel tank?
Thanks.

Yes, mine is 4/87. I'm not suggesting replacing the pump, I'm suggesting to make sure it's working. You may find that you don't need to spend the time/money on a surge setup with a functioning pump. If my car can run down to less then an 1/8 of a tank without cutting out, I think yours should be able to do 1/2 a tank no problem. If you aren't racing, you probably don't need the added security of the surge tank.

All you have to do is pop the rear seat bottom out, remove the 4 screws holding the access panel on, disconnect hoses/connectors, and rotate/remove the pump.

[Lof8]

Make sure the in tank pump is working. Mine would cut out at 1/2 tank or so around long corners. Turns out the in tank pump failed. I replaced it, and could run it down to probably 1/16 of a tank and it still didn't cut out. The factory setup isn't bad, it's split in the middle and has a can with small holes around the pickup that keeps fuel in there. I'm sure there's some long corners that will cause some starvation, but I think a lot of people just have dead pumps. the car still runs fine otherwise, so it's hard to tell.

Obviously for a dedicated race car, you want a surge tank setup, but I don't think you should have to do that for the occasional track day with your street car.

This is in an early car setup? You're suggesting just replacing the in-tank pump, as it may be dead? Does that require dropping out the fuel tank?
Thanks.

[diegom6]

A better surge tank design is a four port tank with the fuel returning from the engine bay feeding into the surge tank. That coupled with a 63L tank fitted with two transfer pumps would be the ultimate fuel system. You should be able to run that down to fumes.

any draw?

[JGood]

Make sure the in tank pump is working. Mine would cut out at 1/2 tank or so around long corners. Turns out the in tank pump failed. I replaced it, and could run it down to probably 1/16 of a tank and it still didn't cut out. The factory setup isn't bad, it's split in the middle and has a can with small holes around the pickup that keeps fuel in there. I'm sure there's some long corners that will cause some starvation, but I think a lot of people just have dead pumps. the car still runs fine otherwise, so it's hard to tell.

Obviously for a dedicated race car, you want a surge tank setup, but I don't think you should have to do that for the occasional track day with your street car.

[jlevie]

I made some surge tanks for racers last year. They are about 1 litre. And I swear, we were able to run on an almost dry fuel tank. As long as there's fuel remaining in the surge tank, the car can go and go and go... The first pump fills up the surge tank, and the excess returns to the main tank. The second pump is fed from the surge tank. 1 litre of fuel is burnt every minute at full throttle. Meaning that the first pump can run dry for a full minute until the surge tank is empty...

A better surge tank design is a four port tank with the fuel returning from the engine bay feeding into the surge tank. That coupled with a 63L tank fitted with two transfer pumps would be the ultimate fuel system. You should be able to run that down to fumes.

[Hick]

i gave the accumulator to a friend, ill see if he can get the PN

[TomSuddard]

I didn't want to deal with the weight and packaging of a surge tank, so I just switched to a late (post '89) tank with two late in-tank pumps (the high pressure ones, not the pre-pumps). Then I made a few lines (please don't use like 8 feet of rubber line to do something like this just because it's cheaper and easier. Do it right and make some stainless lines) in order to connect each pump to the factory fuel line going to the engine. I connected the return to the return line on the tank. It works great and now I can literally do clockwise circles on the skidpad all day long.

Before this, I'd been using one of the pumps as a transfer pump to send fuel to the pickup bowl for the pre-pump, which then fed the main pump. Besides being heavier and more complicated, this setup also didn't work as well.

[einstein57]

e30 performance engine


http://store.nexternal.com/shared/St...unt2=824515938


So does anyone have the part #? The problem is way worse now that i'm boosted. I get starvation at about half a tank even on not so long turns now.

My 85 gti has an accumulator but the last time i checked it was a $150 part.

[diegom6]

WHere is IE website is the anti surge tank device!?

[Lof8]

I was experiencing some of this over the weekend. Anybody figure out the Audi part number?

[jlevie]

Yes, that can be done.

[dude8383]

Somewhat on topic, but would it be possible to install the pre and main pump on a car that wasn't originally equipped with it...like my 318is?

I'm thinking about purchasing the larger 63L tank to increase range.