1995 buick regal won't start with the key you have a new starter and when you try to start it with the key you here klicking under the hood but that's all and if you try to use a push button switch it?

Answer 1

I don't know if you're saying you changed the key system to a starter system or the system wouldn't start but just clicks.

If its the latter, you may want to check for coolant in your cylinders by removing your spark plugs and spinning the flywheel. If any coolant comes out of the cylinders, then you don't have a starter system problem. The plenum on your Buick, (the plastic dome above the intake manifold/ the black rounded dome on top of the engine) may have wore a hole in itself due to friction and has pumped coolant into your intake manifold until it spills into your cylinders and makes them too full of coolant to spin through with the starter.

Again, this may be completely not the issue if you know for certain you haven't lost any coolant recently or know its a wiring problem. But this thing had me puzzled for two weeks until I took the plenum off so I figured I'd throw it out there.