i have a 91 hatch with a z6 and at low rpm it sputters and it is running rich as hell
the timing is right on the money
could it be because it does not have a good spark ( it has new cap rotor plugs and wires)
would it help if i put a external coil
and could it be a head gasket

 

do you have your map sensor hooked up, are you throwing codes? are you ob0 or 1? what kind of fuel pressure do you have.?