From: bashley101@gmail.com   
      
   This (rec.autos.driving) used to be a good group.  What happened?  On   
   the off chance that anybody is still actually alive, posted below is   
   what I've posted into two Cadillac "forums" with no help whatsoever,   
   although one person suggested replacing the stuff that had already been   
   replaced.   
      
        At least 5 times (2 with witnesses) this car (which I inherited   
   from my mom in 2007 with 65K miles on the odometer and which has   
   sentimental value) has suddenly accelerated as if I had floored the   
   accelerator. I brake as hard as I can, pull to the side and shut the   
   engine off. When I start up again everything is normal. The first time   
   was from a full stop, with two more occurrences within the next 50 miles   
   at freeway speeds. One time going uphill on a mountain road, and the   
   remaining times at freeway speeds.   
      
        I've had this stuff replaced by a trusted GM independent mechanic:   
      
        Feb 2011 Replaced the idle speed actuator (idle air control valve   
   D6576 due to accelerating on its own.   
        Mar 2012 Replaced the throttle position connector HP4460, Throttle   
   position snsr/throttle position sensor TH38, throttle spring kit (fast idle)   
        Oct 2012 Rebuilt smog pump 32-428, serpentine belt. Disconnect   
   cruise control and inspect powertrain computer for internal failure (tap   
   test). Replace broken engine mount.   
      
        I never used the cruise control, which stopped working while my mom   
   still owned the car. It has 85K miles now.   
      
        It's done the runaway thing at least once, possibly twice since   
   then. No codes.   
      
        The mechanic thinks it may be the computer dropping out and then   
   resetting itself at full throttle, which sounds even dumber than   
   deciding that a car should decelerate SLOWLY when you take your foot off   
   the gas, and that there is no guarantee that a replacement will be any   
   better.   
      
        More recently it has started to occasionally maintain speed on   
   level ground when I take my foot off the gas, and may have occasionally   
   slightly increased speed, but braking stops this instantly. I haven't   
   talked to the mechanic about this yet.   
      
        I really hate to junk a car with only 85K miles, especially my   
   mom's car, but even though I'm 5 for 5, it's still scary.   
      
      
   --   
   Cheers, Bev   
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~   
   "If you see me running, try to keep up."   
          ...Back of bomb technician's shirt   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)