Why does my RPMs jump up and down?
Why does my RPMs jump up and down? Hi There, It sounds like you may have a dirty or failing idle air control valve causing your engine idle to fluctuate. The idle air control valve is a small valve on the engine's intake system that reads the air intake as it comes into the motor. Why does my Ford F-150 stall when I slow down? After starting and engine starts to warm up the idle speed starts to lower to the point when your slowing down the engine dies. Engine will start back up fairly easy but does not want...