sluggish

Hello gang, I just got a 1997 Buick Deluxe Wagon. This car is full of this very fine dust. From dirt roads. So please keep in mind, trying to clean engine and sensors...but here is the issues.... When the engine is cold, everything is fine. Once it warms, it is a very slow and sluggish...

I didn't see myself getting a buick, Ive always been a Bonneville person. Ive actually been at the bonneville forums for a long time, but now Im here. My buick did come with some problems though. Ive did a full tune up and did not notice any restored power and those spark plugs were old and over...