Well my grandfather is a stubborn fella. He barely drives and has a 1995 Ford Taurus GL 3.0 V6, with less than 60K on the clock. My 04 Jetta with 135K drives better than his car, and has had less problems, but he just won't give up on fixing it.
Two days ago he had the car on the street, moved it to the garage, car started and ran fine, pulled it in the garage and parked it there for the night. The next morning he went to get in and start it and the car sounds like its misfiring badly. I got over there and decided to change the plugs since they are original. Gapped them to .044 and still the problem persists. Grabbed a new Idle Air Control motor/valve since his was gunked up pretty bad. Still the problem remains. Checked the Throttle position sensor and it was showing an open circuit as I read the resistance while sweeping the throttle open, so I replaced that, still the car runs like dookie.
I'm lost as to what else it can be that it just randomly goes from running fine one day to running like complete crap the next. I upped the idle a little and the car seems to be running fine, almost as if the car isn't getting enough air at idle. I even disconnected the MAF and ran the car and the problem still stuck around. The MAF is clean as a whistle.
Anyone have the slightest idea what could be causing such a rough idle that the car sometimes stalls out? I got it on the road and other than idle the car seems the same, acceleration seems fine, does not feel like its misfiring at all, but at a stop no matter if you are in Drive Park Neutral or Reverse the car almost always dies.