Need help with OIL,TEMP and RPM gauges
 

I serched for it with not much luck, I have a 84' MC. my temp gauge does not work, my oil gauge does not work and my RPM gauge is really advanced like when im in idle it will read 4000rpm, does any one have any troubleshooting advice they could give me!! thanks

Are they aftermarket? If they are, I know on some tachs there is a dial that you turn to get from 4 cyl to 6 cyl to 8 cyl. It may be set on 4 cyl. Also, is the oil pressure gauge electrical or mechanical? If you could post some pictures it would be ideal.

everything is 100% stock from a 1984 montecarlo