[Old Lar]

Code 33 - Manifold Air Pressure sensor
Check the vacuum hoses from the MAP sensor. Check the electrical connections at the ECM. Replace the MAP sensor.

Code 34 - Manifold Air Pressure sensor
This code will be set when the signal voltage from the MAP sensor is too low. Instead, the ECM will substitute a fixed MAP value and use the TPS to control fuel delivery. Replace the MAP sensor.

Since you have replaced the MAP sensor, do more checking on vacuum leaks. Of course the "new" MAP sensor may be bad. Normal idle when warm should be below 1000 RPM