It all started after I replaced head gaskets, Since then my blazer his been giving my problems. Now it is missing out when I first give the gas, but once it shift gears it stops until I get to cruising speed at 1800 to 1900 rpms, The check engine light is NOT on. It is getting to the point that Iwant to change the Engine, it dose have 301,454 miles on it,
It ran fine until it blow the head gasket because of the water pump sprang a leak.

Any ideas