Hi - I just posted my experience to another member, but hear goes.... The secret is in the float. Most Ford sending units hav a brass looking float that attaches to the sending unit. My daughter used to have a Pinto. I went to the Ford dealer to try and get a new sending unit. They didn't have it, but they told me the float is something they stock. If you don't change the float, it will start taking on gas and not "Floating" like it should. The Pinto float was less than $5 and worked great. Hope this helps!