From: ppearson@nowhere.invalid   
      
   My 1982 pickup with the 22R engine (manual transmission,   
   California emissions controls) runs very raggedly under no   
   load or light load while warming up: stalls instantly at   
   stoplights, and while driving jerks as if I were tapping on   
   the accelerator.   
      
   My favorite two shops have failed to fix the problem, but I   
   think its idiosyncracies are so clear that someone who knows   
   old carburetted engines could probably diagnose it in a   
   minute.  Here are the specifics:   
      
    * The engine starts easily.   
      
    * The Problem typically starts after 1 or 2 minutes   
      of driving.  On very hot days, it starts sooner.   
      
    * The Problem disappears abruptly and completely after   
      about 15 minutes of driving.   
      
    * Aside from the instant stalling at stoplights, The   
      Problem is only noticeable when the accelerator is   
      depressed slightly.  If the accelerator is depressed   
      more -- say enough to drive up a gentle grade at   
      60 MPH -- performance seems to be fine.   
      
   Does anybody see an obvious interpretation?  (BTW: is this   
   the right place to ask?)   
      
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