88 YJ bouncing fuel gauge
I am still trying to identify why the fuel gauge needle bounces all over once the tank is a little less than full. The sending unit was replaced by the dealer in 1994 , yet the problem persisted. The dash gauge assembly has been disassembled and cleaned several times . The shop manual indicates that at EMPTY , the resistance in the sending unit resistor wire shoud be close to zero . At FULL , the resistance should increase up to 88 ohms. I do not believe that a faulty ground is the culprit as this would yield a FULL tank reading which I have not observed to occur. Because the gauge does not bounce with a truly full tank level , I do not believe that the juiced wire intermittently shorts to a ground -- if that occurred , the gauge needle should be observed to momentarily drop to EMPTY as the resistance momentarily drops to zero during the short to ground. Such an event has not been observed when a full tank of gas is present. Is there a baffle plate in the tank which should prevent sloshing of the fuel level? Has anyone learned of the cause / cure to this malady ? I keep checking past postings for the solution . None seen yet under the SEARCH function. The CJ article does not seem to apply . I do not see any dampening mechanism in the dash gauge unit.