Fuel filter screens

[RAFFEAL]

If i witch around the two fuel lines at the back before the fuel filters and there is a change on engine bank it means the fuel pump is no good

[8Tech]

I am assuming thats a question on if you switch the 2 fuel hoses around then the engine would run on the opposite bank?

If I am correct, all you will need to do it disconnect both of the fuel lines where they enter the filters and drop them into a small container and then briefly crank the engine to see if you get a fuel delivery from both lines.

This will check that both pumps are delivering fuel. If they are, then retry with the outlets of the filters detached as you may have a fuel delivery restriction in one filter.

8Tech.

[RAFFEAL]

That sound good thanks i will try

[RAFFEAL]

only fuel coming out of one fuel line before the filters will change both fuel pumps are they easy to install and remove there under the back seat

I am assuming thats a question on if you switch the 2 fuel hoses around then the engine would run on the opposite bank?

If I am correct, all you will need to do it disconnect both of the fuel lines where they enter the filters and drop them into a small container and then briefly crank the engine to see if you get a fuel delivery from both lines.

This will check that both pumps are delivering fuel. If they are, then retry with the outlets of the filters detached as you may have a fuel delivery restriction in one filter.

8Tech.

[RAFFEAL]

I got two new fuel filters and i was going to install them and it said to change the fuel filter screen has anyone change there fuel filter without replacing the fuel filter screen is it a must

[mjrgroup]

No. I'm not sure what the screens are or what they refer to. The "screen" may have something to do with the fuel pumps.

To do filters on an 850i, follow this procedure:

-With the car off, remove fuses #23 (fuel pump for cyl 1-6) and #24 (fuel pump for cyl 7-12)
-Start engine and let it stall due to lack of fuel (since pumps are off), this relieves pressure in the fuel hoses
-Remove filters and hoses, replace filters, hoses and hose clamps
-Replace fuses 23 and 24, turn key to ignition setting 2 for about 10 seconds (i believe this activates fuel pumps)
-Crank engine and push gas pedal to start car (it may be a little difficult)
-Use fuel line hose clamps that are flat metal WITHOUT serrations.

[RAFFEAL]

Thanks
i have not run the car for two weeks do i still have to remove fuse and start the car

[RAFFEAL]

My e31 came from japan can you send a pic of those location of 23 & 24 fuse in your fuse box thanks if i need to do it beening i disconnect my batts two weeks ago thanks

[Max Lumens]

It's not a bad idea to check the screens on the fuel pumps; I've seen several of them with splits and holes in them.

[mjrgroup]

You do not need to remove batteries.
You have to remove fuses 23 and 24 from the fuse box on the driver's side firewall in the engine bay and then start the car to stall the engine. This reduces the fuel pressure in the fuel system and hoses. It doesn't matter how long the car has been sitting, you need to do this.

[RAFFEAL]

I change them but now my gage is stuck on e the light stays on i never pulled the fuse but just a little fUEL Came from the hose you think the floater is jamb i had a hard time putting it back in

[RAFFEAL]

I change the fuel pumps cause i disconnect the hose than go's into the fuel filters and started the engine cause i was running on 6cly not 12 and found that fuel was only coming out of one fuel line i change both pumps and still running on 6cyl what can it be

you do not need to remove batteries.
You have to remove fuses 23 and 24 from the fuse box on the driver's side firewall in the engine bay and then start the car to stall the engine. This reduces the fuel pressure in the fuel system and hoses. It doesn't matter how long the car has been sitting, you need to do this.

[RAFFEAL]

Change both fuel pumps same thing but never try the hose before the filter again

[RAFFEAL]

I change both of my fuel pumps after i found that fuel was only coming out of one hose when i took the fuel hose off right before to fuel filter i was sure this was why i am on 6cyl and not 12 but still the same only thing different is i seen the eml light come on but then went away after few min need help thanks

[Samurian]

I change both of my fuel pumps after i found that fuel was only coming out of one hose when i took the fuel hose off right before to fuel filter i was sure this was why i am on 6cyl and not 12 but still the same only thing different is i seen the eml light come on but then went away after few min need help thanks

Have you checked ignition coil?

[legoman67]

without a spark signal you wont get fuel. Check your crank position sensor for that bank.

[Wuffer]

Ummm.... this post is from 3.5 years ago.