PCV valve:is there an easy way to check if its working right?
^What he said, or take it out and shake it, if it rattles, it's good. Did you buy the car off an individual or a dealer? What I'm getting at, is there anyway you can find out what has been done to the car maintenance wise? When I bought my car, used, I replaced these things because I didn't know what had been done:
1. Air filter (easy to check, if needed) $10-15
2. Fuel filter $20
3. Spark plugs $8
4. Rear diff. oil $3 (Valvoline Durablend 80w90)
5. Front diff. oil $13(Valvoline Durablend 80w90)
6. Tranny oil or fluid depending on manual or Auto.
7. PCV $9
I don't mean to be spending money for you, but with 100k on the odometer why not change the timing belt and water pump too since your already in there. For under $80 you do all the things mentioned above and not have to worry about it. Of course, I don't know how deep your wallet is or what your mechanical abilities are, but these would be safe measures.