now think what na is like.... common... low power.. rough idle as no kick up for its load when on..
There's no provision for automatically controlling the idle on these, it's "static," and they barely make enough horsepower at idle to run the a/c. And, there's no control over air at all, it's all done by controlling fuel.Also, as these injection pumps wear, the idle speed decreases.Assuming there is nothing wrong with the a/c system and it is not overcharged, the idle speed may be too low and may need the necessary adjustment on the pump made. If your car vibrates a lot even with the a/c off, the idle is probably too low. It's pretty easy but you should adjust it very slowly, and keep track of what setting it was on, as it's very sensitive, go too far and it won't return to idle.
well knowing what year it is.. some later 1.6 kick up idle when advance pulled.. that is a way... old audi 5000 has a rotating knob hooked to a cable to turn up the idle via drivers seat if it vibrated too much with ac on... it was a cable to throttle lever trick..
I like to idle them low. A small pressure on the go-go pedal is enough to remove the vibes. I wouldn't think you'd need more than 100..