Roadcuda
Well-Known Member
Today I took my bird to my Mopar mechanic to get the timing straightened out which is much better now! But what was thought to be the other easy thing turned into a marathon. Before the Carlisle trip I put another new sending unit in the car, which turned out to be worst then the one that was just a year old was. So one thing we did was pull the sender out to test to test the ohms and found it to be between 8 at full and 70 at empty. Also he tested the gauge itself and it seemed to move through the full range ok. So we hooked up the wires out of the tank and moved it through the range and found that it was reading about a 1/4 tank low throughout the range. We then tested the unit that was in it before which was a little better, but not much. So it was decided to try bending the float arm and did that in two places on the arm. It was placed back in the tank, and refilled at about 5 gallons at a time. So after putting 15 gallons in it only move up to half full!
Well, the tank was drained again more adjustments were made, put back in with the same results. While it seemed to show close to full and empty the biggest problem seemed to be nothing was showing in the mid range of travel. So we opened up the housing on the sending unit to make sure there was contact in the full range of movement and there was.
Since he is a bit of a Mopar parts hoarder, he found some original sending units he had. we opened up one of these and discovered something that may, or, may not contribute to this problem. On the reproduction units the windings are about 7/16" wide for the full length of travel. While looking at the original unit it was found that at the empty end of travel the winding was also about 7/16", but it narrowed down to about a bit over 1/8". When this was put into the car the gauge read much closer to what was actually in the tank. Still not perfect, but was a big improvement over the repro, junk out there now. The gauge is reading much more accurately now. So we are wondering is the fact that winding narrows down the difference in why it seems to read more correctly, then the new ones at are the same width through the travel area, especially in the mid range areas. What do you guys think?
Well, the tank was drained again more adjustments were made, put back in with the same results. While it seemed to show close to full and empty the biggest problem seemed to be nothing was showing in the mid range of travel. So we opened up the housing on the sending unit to make sure there was contact in the full range of movement and there was.
Since he is a bit of a Mopar parts hoarder, he found some original sending units he had. we opened up one of these and discovered something that may, or, may not contribute to this problem. On the reproduction units the windings are about 7/16" wide for the full length of travel. While looking at the original unit it was found that at the empty end of travel the winding was also about 7/16", but it narrowed down to about a bit over 1/8". When this was put into the car the gauge read much closer to what was actually in the tank. Still not perfect, but was a big improvement over the repro, junk out there now. The gauge is reading much more accurately now. So we are wondering is the fact that winding narrows down the difference in why it seems to read more correctly, then the new ones at are the same width through the travel area, especially in the mid range areas. What do you guys think?
