ok i just went on vacation and i left my blazer sitting up for 3 weeks. when i got home and drove it the reverse felt slugish and when turning it would stop unless you gave it gas. but it only does that in reverse. what could it be?

thanks for your help.

 

check your power steering fluid. There is also some sort of sensor on the power steering system that is tied into engine rpms. I dont know the name of the sensor.