My car doing something weird... Ok so ill start off in 1st and it will go the the tach it like jumping up and down and it sounds like it is chugging along it happens most of the time like almost running out of gas but i have a full tank its like air is comming though or something anyone know let me know thanks...

im assuming your refering o your rpms jumping up and down? a better description of that would help.

with the current description, i would have to say iacv, low or uneven compression, vac leak, or tps.