ok here after a week or so I noticed my idle gets really rough. last sunday when I went to move my truck the idle was so rough that it was shaking the whole truck. and now it seems to like the engine is lobing at idle now. anything I can do to try and remedy this? could it be the TPS? I noticed the oil is a quart low but wouldnt think that would cause it. dont worry going to get some oil now. air filter is cleanas its a K&N drop in filter I put in this past feb. please help me. I might have to put it in the shop.