Car is a '91 V6 Firebird. As im driving sometimes (just started recently) once I get past about 3K RPM, the car may start to bog and almost seems like its dying. Usally happens at about 50 mph, it drops to 30 mph when it bogs, then go back up to 50, then bogs down again. and starts to drive normally again.. I had a SES light a few days ago, it went away after an hour of driving. I unlocked it by using that key thingy and it told me a code 44, defective map/02 sensor, low fuel pressure or malfunctioning injector. Could any one of these problems cause the car to bog down at a certain speed? Its almost as if spark or fuel is cut off when its bogging.. incredibly weird ****!

plz help!

 

When was the last time you changed the fuel filter? If that isn't the problem i would check fuel pressure next before assuming you have a faulty injector.