7747 "shaking" the vechile?!

[CSH-HQ]

747 has no IAT compensation, so the sudden change in temps can't be comp'd 
for.  However, with a Baro reread at restart, things are a tad closer, and 
seem "better".  
  Might try a "approaching WOT" TPS signal to reset baro.
Grumpy
  


>Well, what happened: I started my VAN this morning from garage (+17degC) and 
>drove it to work (outside -15C). While driving constant speed of little more 
>than 40mph I felt fairly high-freq constant shaking at that speed.
>
>I was driving the car in Drive (350 TBI, THM-700 tranny, factory rear) so I 
>tried 4th which didn't shake and then drive which shaked as previously. I 
>think by doing this I eliminate (at least some amount of) the 
>tranny-originated causes.
>
>Then I set gear to neutral, and keyed engine down during driving. After 
>couple of seconds I ignited and set gear to drive and accelerated to the 
>same speed - and surprise!? no shaking.
>
>This have happened some times before and I'm wondering what might be the 
>cause? The car feels like "being in bad mood" after ignition, but if shut 
>down and ignited again it works better...
>
>Anyone comments?
>
>-Mika
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