i have a 93 prelude si, it has a problem spuddering in 2, 3, 4 and 5th gear around 3000rpms but only when the car warms up. tune was done except 4 O2 sensor, fuel filter was changed and oil. changed the mass air flow that bolts 2 the exhaust manifold, car was ok for a day. doesnt do nething in 1st gear can some1 please help me.