I have always had a weird issue with my fuel level.
It reads the level of fuel correctly. When it shows empty it is empty and when I fill it up it shows full. But' It has an issue where the if the level falls below a quarter tank it will not start again. When you try to start it, It will turn over attempt to start for 1/2 a second and die. When you add fuel and it goes past 1/4 tank it starts right up, no issues. But I can drive it completely empty and it will not shut down if I started up before quarter tank.
I bought the Suburban back in 2017 and it has always been like this, not really an issue ( I just always filled up before quarter tank).
But lately it seems that that 1/4 tank level is going up. Today I got semi stranded when at about 3/8 tank. Same issue didn't want to start. I first tried to clear fault codes to see if that would fix the issue (There where no fault codes) But that didn't work. I then disconnected the battery and reconnected it. And it started right up, no issues.
So the problem is not the sending unit ( I think ). So I do not want to replace the fuel pump Assembly (I have recently modified with an Aeromotive 11569 Fuel Pump ).
My question is. Is there a way to disable/adjust what ever is causing the ECU to cut fuel/spark to the engine when it hits a certain fuel level?
After the fuel pump modification, when the suburban is on, it pumps fuel (It is directly connected to battery (with relays and fuses)). So I do not need any fuel pump management from the ECU.
The vehicle runs absolutely perfect outside of that issue with the weird fuel cutoff at a 1/4 tank or so.
Thanks