Anti slosh vs sending unit.

[Dirtman]

Fuel gauge on the new truck keeps sticking. It's either the sending unit itself or the anti slosh module. Correct me if my logic is wrong here, but if I hook the scanner up and bring up the PID for the sending unit (which doesn't run through the anti slosh module) and it bounces around like mad while I drive then the sender is functional and it's most likely the module correct?

 

[RonD]

2009 won't have anti-slosh module, 2004 and up use HEC(hybrid electronic cluster), so 2003 and earlier only for anti-slosh

In my diagram I show fuel sender wire going only to the cluster, not like 2003 and earlier where it went to cluster and PCM

So if I had to guess I would say sender is the issue, but you can do that PID test and see if it changes

You can run HEC test, to make sure fuel gauge needle is free to move

 

[Dirtman]

Should have specified, not my ranger. It's for my 2003 f350.

 

[RonD]

Then yes, sender runs to both analog gauge and digital PCM so PID could tell the tale