i got a 92 bmw 325i manual trans, and recently ill be at a red light and go to into first gear and go to take off and the rpms wont raise as well starts putting. therefore i got back into neutral and hit the gas harder to bout 4500rpm than go bad in to first starts to take off it shifts fine all the way up to fifth gear than starts to jerk a little and gets so sluggish it slows the car to a slow stop. also car starts fine, idles fine, and it neutral will rev all the way to 7000rpms no problem. any ideas?

The eml light came on and when I step on the gas pedal the car idles goes down the car jerke's and power is weak