My '75 914 2.7 conversion has the getty 911 dash and 911 guages. Ever since I purchased the car, in early may, the oil pressure guage has registered 100 psi when I turn on the key and stays there. The oil pressure light comes on but then goes out after the engine warms up a little.

Where do I begin to chase this down?

- the back of the guage?
- the sender unit?

Could the guage be bad? if so, how do I check it?

If the sender unit is bad, how do I check it?

Just looking for a little help on where to start looking....

Thanks!

I would think about investing in a mechanical gauge. 90% of the time, when you get a whacky reading, its the electronics. A mechanical gauge should be about 40-50 bucks for a good one. That will tell you without a doubt if its good or not.