I bought a '96 Toyota Camry about a month ago.
When I first turn the car on and the engine is cold, I can have the car stopped (in gear) and it will not shake. The idle RPMs will be at 1000.
After the car has heated up, I notice the idle RPM drop by about 250, and the steering wheel/car begin to rumble and shake. If I keep my foot on the brake and then tap the gas just enough to raise the RPMs back to 1000, the shaking stops.
In neutral or park (it's an automatic vehicle) the shaking diminishes but the RPMs do not rise from 750.
I was told the car had good even compression in the cylinders when I bought it from the dude, but you never know. Ideas?