It could be a leak. Check to make sure there was no carbon build up where the EGR mounts to the intake. Also, to check for vacuum leaks, many times mechanics will use something like carb cleaner to check for leaks. If there is one, the engine will draw in the cleaner and the RPM's will change. However, (AND NOTE), carb cleaner is flamable and can cause a fire if it hits something on the engine that is hot enough. Make sure to have a fire extinguisher near by that is good for a grease / oil fire.
Friday, April 8th, 2011 AT 12:25 PM