Fuel tank pump issue, level sender issue

[80stech]

The OP needs to take a step back and diagnose a bit more methodically. He supposedly has no power to the fuel pump, the fuel pump is no good, the sending unit doesn't work and the syphon jet doesn't work (or isn't there) and he's wrong on most of those assumptions. The pump won't work if there is no power, the guage won't necessarily respond directly to working the float up and down, there is a small amount of fuel in the fuel pump well which might be normal, etc.

[andrewwynn]

Originally Posted by 80stech

The OP needs to take a step back and diagnose a bit more methodically. He supposedly has no power to the fuel pump, the fuel pump is no good, the sending unit doesn't work and the syphon jet doesn't work (or isn't there) and he's wrong on most of those assumptions. The pump won't work if there is no power, the guage won't necessarily respond directly to working the float up and down, there is a small amount of fuel in the fuel pump well which might be normal, etc.

He replaced the pump. Comfort start will not apply power to the pump until your turn the key.

I think he got the car running now just trying to get the siphon jet working so no more dead in the water at 1/4 tank

[Collie]

Originally Posted by andrewwynn

He replaced the pump. Comfort start will not apply power to the pump until your turn the key.

I think he got the car running now just trying to get the siphon jet working so no more dead in the water at 1/4 tank

I actually came to a stop and posted this thread. I became confused after looking at the real OEM site and knowing my vehicle did not have any of the cross over hoses attached to my pump assembly as shown. When I opened the left side of the tank and saw fuel and another level sender and no type of pump I shut the door and slept on it. After reading your post you have confirmed my thoughts. That is that the return from the filter back to the left side assembly creates the pressure to transfer fuel left to right. I would like to know your thoughts that I have that possibly the right side level sender registers 1/4 to full, as it did when I manually moved it through it's range, and when it bottoms, the left side sender takes the fuel level from 1/4 to empty?

[wpoll]

Originally Posted by Collie

... I would like to know your thoughts that I have that possibly the right side level sender registers 1/4 to full, as it did when I manually moved it through it's range, and when it bottoms, the left side sender takes the fuel level from 1/4 to empty?

The full gauge reading is the sum of the readings from the two halves of the tank - it is not that one sender is part of the range and the other is another part.

If you unlock the cluster menu you can see the actual sender values in test #6: -









(pics all thank to Qsilver7)

[Collie]

Originally Posted by wpoll

The full gauge reading is the sum of the readings from the two halves of the tank - it is not that one sender is part of the range and the other is another part.

If you unlock the cluster menu you can see the actual sender values in test #6: -









(pics all thank to Qsilver7)

Remind me how to get into that menu if you will. It's been awhile since I have done it. And your explanation of the sum of both sends the level to the display makes sense.

[wpoll]

Originally Posted by Collie

Remind me how to get into that menu if you will. It's been awhile since I have done it. And your explanation of the sum of both sends the level to the display makes sense.

This video shows it - but all you do is enter the BC (hold right button down until Test No. 01 appears), use right button to step to menu 19, press left button once, then enter the sum of your VIN numbers (using left button) and press right button.



https://youtu.be/iVabtlbhCdc