not a normal overheating issue what could it be
 

Ok so over the past few weeks my car had wanted to over heat on me in the morning when it's cool it has been fine above 85° it's slowly starts to rise after 10 miles of driving I can pull over and let it idl eand it will cool off back to normal I have changed thermostat radiator cap fan is working cannot find any leaks anywhere I have also flushed out several times once with the cleaner after I flushed it out it would run fine for a few days then back to overheating I ran a pressure test today where 2 cylinders were at 149 psi and the other two at 151 no antifreeze in oil and no oil in antifreeze it has gotten to the point where I can't drive it over 5 miles after initial warm up any help would be appreciated thanks in advance

Just did coolant pressure test also came back negative

Just did coolant pressure test also came back negative

Could still be a head gasket, have the coolant checked for hydrocarbons. Might be pushing combustion gasses in to the cooling system.

-Steve

How do I do that