Changed My Fuel Sending Unit, Not Working Properly.

[Matt01]

So i bought a brand spanking new used fuel sending unit for my car and changed it while i was replacing my leaking gas lines on my 850 AWD. It works perfectly intill it gets to about 15L. It gets to this point, slightly under and my car starts stalling and stuttering, and eventually will run out of gas.

It never goes down to the 10L mark, never get a fuel light. Its like its off calibration or something. What could be the problem?

Thanks.

[erikv11]

sorry I don't know what the problem might be but this made me :lol:

... brand spanking new used fuel sending unit ...

[Scootdiggity]

sorry I don't know what the problem might be but this made me :lol:

This is common in awd models I have seen a few threads posted up on other forums after they did work on fuel tank and said they guage how much fuel they have based on mileage because they couldnt figure out problem

[Matt01]

This is common in awd models I have seen a few threads posted up on other forums after they did work on fuel tank and said they guage how much fuel they have based on mileage because they couldnt figure out problem

i was thinking if i leave the batt unplugged for a while it would reset back to 0? I have no idea.

[czar]

So i bought a brand spanking new used fuel sending unit for my car and changed it while i was replacing my leaking gas lines on my 850 AWD. It works perfectly intill it gets to about 15L. It gets to this point, slightly under and my car starts stalling and stuttering, and eventually will run out of gas.

It never goes down to the 10L mark, never get a fuel light. Its like its off calibration or something. What could be the problem?

Thanks.

10L is practically empty (2 1/2 gal)...maybe the light is burnt out?

I hardly ever let my tank get below 1/4 tank. I couldn't even tell if my light is burnt out...it never gets that low

[Matt01]

10L is practically empty (2 1/2 gal)...maybe the light is burnt out?

I hardly ever let my tank get below 1/4 tank. I couldn't even tell if my light is burnt out...it never gets that low

the light works, because when i first started the car after the subframe drop i had just maybe 3 or 4 liters in the tank and the light was on and the needle was so low. I guess if theres no soloution, ill just make sure to keep my car above the 15L mark.

[AverageVolvo]

So i bought a brand spanking new used fuel sending unit for my car and changed it while i was replacing my leaking gas lines on my 850 AWD. It works perfectly intill it gets to about 15L. It gets to this point, slightly under and my car starts stalling and stuttering, and eventually will run out of gas.

It never goes down to the 10L mark, never get a fuel light. Its like its off calibration or something. What could be the problem?

Thanks.

Do the awd models have a gas tank with a hump in it? Possibly second sending unit like late models.?

You can manually manipulate the floater and see if the gas level rises, maybe the contact points are not mating evenly.

[Matt01]

Do the awd models have a gas tank with a hump in it? Possibly second sending unit like late models.?

You can manually manipulate the floater and see if the gas level rises, maybe the contact points are not mating evenly.

yes, it has a hump to allow space for the diff/vicious coupling..

its impossible that its installed incorrectly, it IS possible that maybe the floater rod was bent or something during transport. This would require me to drop the tank again, a job that im not willing to do unless there's another major problem under there..

[AverageVolvo]

Drop the tank? that sucks. I had to verify it on vadis, that is

On Fwd it's very simple, I can change one out in 20min.

If you had to struggle getting it in it's very likely you bent it You have to gently rotate it in they are a Pia on Fwd as it is

[Gilhuly]

There are ways to cut through the under-seat metal to get acces to the fuel pumps on the awds that I have seen that removes the need to drop the tank. I saw a pictorial write up when doing some research on a customer car.

[Matt01]

There are ways to cut through the under-seat metal to get acces to the fuel pumps on the awds that I have seen that removes the need to drop the tank. I saw a pictorial write up when doing some research on a customer car.

yep, and i could have done that in the first place, but i saw a parts car where they did that to remove the fuel sending unit ( the one i bought actually) and i dont want to do that to my floor, and after i just got the thing back together, ill live with it if i have to.