If you lost power while driving in an ice storm and then did not drive it again I would suggest you try the car again if you can before you change anything. Check and see if there is a hose on the air filter to allow warm air to be drawn into the filter. On a day where the temperature is right around freezing and the air is very moist the air intake (The air distributer in an FI car, or the Venturi in a Carb car) can ice up if the warm air hose is missing and all it can take in is cold, moist air.
I had that happen in a carburetored car and it graduallly lost power until it would just barely run while parked, and I had the accellorator pedal held right on the floor.
>From: Greg Merritt <gregm@vwtype3.org>
>Reply-To: type3@vwtype3.org
>To: type3@vwtype3.org
>Subject: Re: [T3] exhaust questions...
>Date: Fri, 25 Jun 2004 09:48:03 -0700 (PDT)
>
>
>
>On Fri, 25 Jun 2004, Jim Smith wrote:
>
> > process is going to be extremely slow and tedious for me. trial by fire
> > methinks.
>
> Take it slowly -- read up, ask questions, and don't play
>hit-and-miss by buying replacement parts unless you can confirm that the
>old parts are bad. If you have time, that's good.
>
> > the gas mileage was great, except for when it was freely pouring out the
> > back of the car from the leaky injectors.
>
> Well, glad you found the list now -- we could have walked you
>through how to repair the externally leaking injectors (a common problem)
>without having to buy new parts. :(
>
>-Greg
>
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>