Didn't work. Infact its gotten worse
That procedure is in the workshop manual, worked OK for me the one time I tried it.
It's supposed to idle around 700. I would check your earths.
Check the battery voltage, should read around 12.5 at rest, and 13-14v while engine running. If it was going OK before you disconnected the battery, the fault must lie there somewhere.
Or like everybody else said, just drive it for a while till it re-learns.
Let us know what happens.