Ok let me start over again, when i start the car it goes up to 1k they it drops half way and fluctuates there for about 3-5 seconds, right after it goes to 1k again then its seems that the car has after market cams cause it sorts of bounces while also fluctuating between 1k RPM (i unpluged the tps and it revs to 2k). When i put it in drive it starts vibrating the whole car (it only does it in drive 2nd and 1st). My method to find out if it is a motor mount is i picked up the engine slightly by th pasenger side and the problem minimized (vibrations) but im not sure if that helps me find out if it is the motor mount or not.

Please help me im trying to figure out the problem before i buy it

Car is a 95 eclipse RS 420a motor automatic No mods