I just got done with a long block swap and the wagon runs like a champ. Cold start great , warm start great, 28 mpg, but when fully warm the tack says it is at 500 rpm. I saw on the hood that timing should be set at 700. How can you set the idle on the SPFI systems. I played with the timing a little but it was hard to get a higher idle and it didn't seem to make much difference like a normal dist. I don't have a timing light so I just set it my sound. If it starts good and revs good, no ping. I saw the idle screw on the throttle body has paint on it like a factory setting. What is the correct way to raise the idle to 700. It idle pretty smooth at 500, just a little loppy.

There should be an idle air adjustment screw recessed on the passenger side front area near the top of the throttle body that you can try backing out a little bit.

I can't stress enough how important it is for you Not to mess with that "idle adjust screw" with the white paint on it.

 

It's not a idle adjust screw.