Both problems are tied together. It is the level of the coolant that is causing the problems. Now there is probably an underlying problem to the low level of coolant and the overheating.
Check for leaks, that is the most obvious. Then look to a problem with the head gasket. Is the coolant level dropping slowly over time?
The level of the water or lack there of is causing the engine to surge. Once the level is filled and the air removed from the system the car engine should go back to a normal idle.
Saturday, January 20th, 2007 AT 5:56 PM