I have a 97 LQ1 in my Fiero. The problem I am seeing is the engine runs great, but when I start it cold or warm, it idles up to around 1800 rpm then slowly decays down to 800 rpm. It will idle like that all day long, but tap the throttle and it revs to 1800 and then slowly decays back to 800. It does the same thing while driving the car. Anyone have any ideas Please?

Twotons