I didn't know you could get a sending unit from a FLAPS. Have you checked the sender with an ohmmeter to make sure it's 30 ohms full and 0 empty? With so much of this stuff being made in china any more, just being new doesn't mean it works right.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.