Can someone help me figure out this car, while driving around the speed just start to to decrease like its losing power but then it will pick back up and it does matter what speed and don't do it all the time. I have change the distributor,egr vale,fuelpump is good,02sensor good, catalytic converter good.

 

What about the spark plugs? injectors? air filter? PCV valve? EGR passages?

Is it throwing any codes?

BTW: Your syntax is horrible

 

sorry about that and yes it has codes 02 sensor but it was good,plugs good, egr,pcv good