Fuel gauge reading full????

[mustangsvt281]

SO my fuel gauge is pegged at full when it only has half a tank in it. When i pull the anti slosh out it goes down to half a tank which is where it should be.

I got an antislosh module out of the junkyard and still no luck. Do you guys think its the anti slosh module and i just have two bad units or is it a bad ground? or fuel level sender?? Not sure need a second opinion. Im leaning more toward the antislosh being off.

 

[mwolson]

You have to replace the anti-slosh module and the gauge together as a unit. They are calibrated together at the factory.

 

[Justinlb917]

Sending unit it's like 60 bucks online or 80 at the auto store.

 

[mustangsvt281]

Sending unit it's like 60 bucks online or 80 at the auto store.

its a brand new 03 cobra sending unit. It reads correctly with the antislosh module out

 

[mwolson]

You can test your gauge/slosh module by disconnecting the sender. Then connect a 22 ohm resistor across the signal to chassis ground ti simulate a sensor in an empty tank. The needle should go to the E. Replace the 22 ohm resistor with one of about 145 ohms and the gauge should read full.

You can use a pot and an ohm meter instead of two resistors.