I checked the PCV valves and all the associated tubing, no rips or soft spots. I replaced the idle control valve and the fuel filter and the idle problem seems to be solved. I'm having multiple issues 1) After warming up the temperature gauge goes to zero and the oil pressure light comes on, the gauge still registers pressure, but the light comes on. 2) Also the check engine light comes on, it gives a code P1289 which is the cylinder head temperature sensor, there's plenty of coolant, and according to a thread I found on here replacing the CHS requires removing the intake manifold - a job I'm not about to try. 3) The AC blows warm air.
I have no idea if these problems are interrelated, or if they were caused by my replacing the battery, but either way it sucks, now I'll have to pay a mechanic to work on it.
Last edited by Accipiter; 06-22-2010 at 08:55 AM.