I am having problems in the RPM. it wants to yo-yo. when I take off it acts like its not getting gas and at idle or rolling the rpm [example= 1200-1250-1200-1250] does not stay where it needs to. I have put new timing chain , tune-up, clean the jets and it still don't want to run smooth. I would appreciate any input concerning this. `CHUCK'

 

Does your car have a throttle position sensor? Thats what it sounds like to me.(Generally speaking of couse, as I have no knowledge of your specific vehicle)