67 Charger Oil Pressure Gauge Pegged

[gcdsn76]

The fuel and temperature gauges read correctly, but the oil pressure gauge is pegged. I changed out the sending unit, but it still pegs. Before I have the gauge sent off to be calibrated, does the 67 use a different or lower PSI sending unit than other years? If so, is there a brand or part number?

[birdsandbees]

Follow the sender wire, it may be grounded out somewhere. Pull the wire off the sender first and turn on the key, does the gauge still peg?? If it does it's the wire, if not it's a shorted out sender.

[Pete in NH]

Hi,

I would check and see if the oil pressure gauge sender wire is not grounded somewhere before pulling the gauge out. If you have a multimeter test meter set it to the low ohms range. With the ignition switch off put one meter lead to a good ground and the other to the sending wire lead. If it reads zero ohms there is a short circuit somewhere. If it reads around 20 ohms or above, I would suspect a sending unit issue of some type. You can try connecting a 27 ohm resistor from the sending wire lead to ground. With the ignition switch in the run position the gauge should read around half scale. If it does, there is a sending unit issue.