2002 3.0 X5 engine stops while driving

[andrewwynn]

You do not need to fill up early just confirm your siphon jet is working.

You do this by monitoring test six and when the total fuel level gets below twenty seven liters, the right side should stay at one point four liters.

If the right side drops below one liter, stop and get gas. You only really need to do that test one or two times a year.

The o-ring failure is from a design defect. The o-ring seal is held together from the center of the assembly so it just torques sideways. You can put a shim in the opposite side and it's forever fixed.

Every first gen x will have the problem eventually.

[kfm]

Originally Posted by cn90

Get O-ring size 22 x 2.5 mm (I.D. x thickness).
You can find it at "O-ring and more" website, Henrico, Virginia.

PS: iirc, factory is 22 x 2 mm. The difference of 0.5 mm in thickness makes a difference.

Great, that is one of the sizes in the set I ordered from Amazon, which I can get tomorrow morning. Thanks!

[kfm]

Originally Posted by cn90

A note for everyone...

After you fix this O-ring issue, to test the siphon pump system, once the fuel level is approaching 1/4, carry a gas can (the stuff you use to fill the lawnmower) in the trunk with 2-3 gallons, then keep driving so it drops to 1/8. This is how you safely test the system w/o being stranded.

On long road trips with gas stations far apart, keep fuel > 1/4 at all time if you can. It is really not fun being stranded in the middle of nowhere. In the city, you can easily get help. In the middle of the corn field, only the cows have sympathy for you.

Yeap, this is what I will do to test！

[80stech]

You should be looking for leaks (gas gushing out NOT air in) that way you can be more sure that you found the problem(s) (maybe the lower fitting is leaking as well) and can be sure when/if you have them fixed.

[kfm]

Originally Posted by andrewwynn

You do this by monitoring test six and when the total fuel level gets below twenty seven liters, the right side should stay at one point four liters.

If the right side drops below one liter, stop and get gas. You only really need to do that test one or two times a year.

The o-ring failure is from a design defect. The o-ring seal is held together from the center of the assembly so it just torques sideways. You can put a shim in the opposite side and it's forever fixed.

Every first gen x will have the problem eventually.

Thanks Andrew. What is test 6? Is this something available in some scanners?

In my case, I don't see the misalignment yet. I will look more into the zip tie fix.

[kfm]

Originally Posted by 80stech

You should be looking for leaks (gas gushing out NOT air in) that way you can be more sure that you found the problem(s) (maybe the lower fitting is leaking as well) and can be sure when/if you have them fixed.

Got it, I will do that after the fix to make sure the fix is good.

If the pump side of the tank is empty, would I still see any gas coming out of the sender? I though the sender sends gas by syphoning, which would require some fuel from the pump to prim it.

[80stech]

The pump side isn't empty.

[kfm]

When I had my problem it was empty, right?

[80stech]

On this forum you said the car was running again but you didn't want to risk driving it right? So when CN90 told you to put gas in the tank and the car started it really meant nothing because the car was already starting and running. Unless there is something I'm missing from what you are posting on other sites.

[andrewwynn]

When leaking siphon jet causes fuel starvation it's not uncommon for after a rest, environmental changes will allow a little bit of fuel to siphon over to the pump and get the car to start but usually run terribly and maybe just fifty feet.

If the car stalls and putting in two gallons of fuel puts you back in business you are almost assured of the siphon jet o-ring failure.

Test six is in the hidden menu. YouTube or google is your friend.

Bring up test six on the dashboard and it will report real-time how many liters of gas are in the left side and right side tank.