strange shuddering

[Brett Dikeman]

On Feb 20, 2006, at 12:46 PM, tmb wrote:

>   oh, and anyone that says i shouldn't be
> revving that high on a cold motor, you're right.
> i had it idling for about 10 minutes before i got
> on it.  after idling that long, the coolant/oil
> temps were definitely up to spec.

The manual is pretty specific about not idling the car to warm it  
up.  It practically says, "just drive the car!"  You'll actually  
increase wear, because the engine doesn't get up to operating  
temperature very quickly (when the engine is cold, the cylinder bore  
is smaller, for example), and the ECU will be running open-loop  
longer because EGTs will take longer to get up high enough for the O2  
sensor to start working.  Also, unless you're in the car, you won't  
see/hear any warning lights if they come on.

I keep it under 3k, very little boost, shift slowly, etc until I see  
both gauges creeping up past the first mark.  It takes barely a few  
minutes...much less if, say, I'm headed straight out to the highway  
or up a nice big steep hill.

Brett