hello, recently i had a bad waterpump or something because it was leaking from the front of the motor somewhere. the shop got it back together and now it is haveing a surging idle. i am thinking a disconnected vacuum hose or a sensor not adjusted or unhooked, maybe the MAFS. somebody thinks the engine overheated and warped a head, which it overheated but after it cooled it ran fine with water in it and no idle problems. the man thinks i have a warped head. but it can't be, it was running fine before it went there. anybody ever have this problem after having the front of the motor apart. they are pulling the plugs to check the color. but i know they should be fine. the car is having a idle surge. any input on this is greatly appreciated. gas prices are killing me. and my baby needs ac.