Fuel sender or fuel pump problem ?
Thread Starter
Instructor
Joined: Jul 2009
Posts: 164
Likes: 10
Fuel sender or fuel pump problem ?
My 2004 C5Z06 has a strange problem reasently
The fuel level gauge will show its full while it will stop suddenly because it is empty of fuel
When I refill it it will take half the amount it should take
So what do you think is the problem ?
The fuel level gauge will show its full while it will stop suddenly because it is empty of fuel
When I refill it it will take half the amount it should take
So what do you think is the problem ?
Le Mans Master
Joined: Jul 2010
Posts: 6,013
Likes: 726
Unfortunately it didn't work for me.
Melting Slicks
Joined: Sep 2011
Posts: 2,258
Likes: 544
From: Appleton WI
If Im understanding you correctly, you run out of gas but when you fill up, it only takes half the normal amount. If this is correct, your passenger tank is not transferring fuel. The jet pump orifice is plugged and needs to be replaced or opened up. My understanding is it is difficult to open up so replacing might be easier.
Thread Starter
Instructor
Joined: Jul 2009
Posts: 164
Likes: 10
If Im understanding you correctly, you run out of gas but when you fill up, it only takes half the normal amount. If this is correct, your passenger tank is not transferring fuel. The jet pump orifice is plugged and needs to be replaced or opened up. My understanding is it is difficult to open up so replacing might be easier.
But why it will show that the tank is full while its not ? Is the tank level sender part of the jet pump ?
Melting Slicks
Joined: Sep 2011
Posts: 2,258
Likes: 544
From: Appleton WI
You have a sending unit in BOTH tanks and they are part of the fuel pump and jet pump assemblies. Under normal operation, the passenger tank is used first and the computer compares the levels of the two tanks to display the fuel level on the gage. Since your passenger tank is not draining, the computer is "confused" and doesn't display the level correctly.
Pro
Joined: Oct 2006
Posts: 515
Likes: 133
May be more than one problem.
I had the running out of gas problem due to a clogged jet pump. The gas gauge would read normal until I drove 100-150 miles or so from full, then it would go to zero because the PCM was sensing incorrect gas levels between tanks (i.e., gas being used out of left tank instead of right tank).
I had the running out of gas problem due to a clogged jet pump. The gas gauge would read normal until I drove 100-150 miles or so from full, then it would go to zero because the PCM was sensing incorrect gas levels between tanks (i.e., gas being used out of left tank instead of right tank).
Last edited by wrmiles; Sep 2, 2019 at 02:45 PM.
