What would make the engine races/rev when it first starts and if I am traveling at about 40 mph?
Oct 26, 2012 at 9:47 AM
KHLOW2008
✓Experienced Mechanic
41,812 POSTS
A faulty IAC or vacuum leakages are th most common causes. If the Malfunction Indicator Light is showing, retrieve the trouble codes and let us know what it is.