loudmaxi

ok so I have a 95 gxe I bought from someone that didn't know anything about cars. it had a constant oil leak while running and also wouldn't stay running unless you held the gas. so I replaced the valve covers did the water pump that was leaking and deleted the erg. shes all happy now just runs a little rough so ofcoarse I'm going to do a tune up. my problem now is my rpm gauge doesn't. now I know 95s suck for this but I even tried a gauge that did work and it didn't make a difference. I checked both fuses and the rest of the cluster works fine all lights and other needles work fine. just the rpm even with the other gauge that works fine in another maxima didn't work in mine. what would make just the rpm not move. I'm stumped!!