55 400 instrument performance

Posted by happy On 2022/6/3 19:42:27
Now that the 55 is getting close to being on the road, it would be good to have the instruments working correctly.
Setting the stage: When starting the car, the in-dash oil pressure gauge showed O, but that’s ok since there is a mechanical gauge running off a T connection under the oil pressure sending switch. Cold idle shows about 30 psi. The gas gauge did not move off E, and the temperature gauge went to mid-range with a stone-cold engine Replace the temperature sending switch, but no change. Obviously look at instrument voltage limiter. Have a spare of unknown condition. Changed out limiter. Results were temperature gauge went to hot peg and fuel gauge went to half tank. Fuel tank has less than five gallons in it.
It seems that both limiters’ may be defective and a new one is needed?
Any and all comments as always are deeply appreciated.
Happy

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