It's worth running one large bottle (treats 20 gallons) of Chevron Techrolene through it for a little injector cleaning.
Andy is correct about the idle characteristics and to some it's a little unnerving. Since mine is a stick shift I have never felt a rough idle because it's in neutral & clutch out at a stop light. When the A/C compressor kicks in there is some harshness and a little accompanying noise. Is your A/C or defroster on when you hear the noise?
Does it change (at idle in gear) when the A/C compressor is turned off & on?
