Happy New Year to all...

I was driving Blanche to the office yesterday. I had thought to myself "Geez this car runs better than ANY 617 I've driven." I put a bottle of Techron this fuel tank, and it seems to have really helped the cold weather starting. Well, I got to the office and into the parking garage. When I put it in park, the idle went up and down from about 750-900 rpm. Over and over. I pressed on the accellerator, and it smoothed out of course. But still no smooth idle. This is my 5th diesel, and none of the others have done ANYTHING like this.
I just installed a new rack bolt which I think I got in a little tight since it won't idle well when cold. Could this have done it? Could the fuel additive be causing that (highly improbable, but thought I'd ask)?
Thanks for any suggestions!!!

Robert

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R Talley
88 BMW E32 735i (make it go away)
95 Volvo 960 "Inga" (valve problems)
95 Nissan Maxima (the indestructible)
89 Ford Ranger XLT (ugliest truck in the South)