Random engine Bogging when crusing

I own a 1987 Beretta GT 2.8 V6 with auto trans. When I'm cruising at about 60 kph every once in a while the engine bogs down / studders / jerks for a split second. I find it quite annoying, any ideas? i've recently replaced my tps, vacuum lines, spark plugs, fuel pump and filter. Its only started happening after i replaced all of the above.

I guess it usually only happens when its warm. I want to try to get it running smooth. I've been outa work for a little while so I've started doing some maintenance.

Replace your map sensor, it will run fine.