Okay, I found my problem. I did a swap into my 1960 C/10. I purchased a new 15/18 gallon stock GM (Blazer) fuel tank. Well, it has a six sided baffle surrounding the fuel pump/sender. The sender lever was riding on the baffle that is about 3-3/4 inches off of the floor of the tank. When I put the fuel pump in, I did not realize that this was happening.
So, I designed/engineered the float lever to go up and over the baffle. I plan to purchase some material to make the float hang from the opposite side, thus preventing it from having to reach over the baffle. Easy fix, just need to purchase material to fabricate.
Now, you may ask how I realized that the float arm was hitting to baffle. I put my ohm meter on the sender terminals to confirm that the sender was reading. Every time that I put the pump in, the meter reading went off of the chart (figuratively speaking). I finally looked down into the tank to see if there was an obstruction. There it was, only inches from where the pump housing rests; the baffle. Problem fixed. Fuel gauge working fine. It read about less than a quarter tank, which was correct. I put 6 gallons in which took it to about 3/4.
Monday, April 17th, 2017 AT 5:05 PM