Could be shagged engine mounts.
-Democracy must be something more than two wolves and a sheep voting on what to have for dinner.
James Bovard, Civil Libertarian (1994)
-Giving money and power to government is like giving whiskey and car keys to teenage boys.
P.J. O'Rourke, Civil Libertarian
-Government's view of the economy could be summed up in a few short Phrases: If it moves, tax it. If it keeps moving, regulate it. And if it stops moving, subsidize it.
Ronald Reagan (1986)
Check which cylinder has the miss by removing each lead one by one from their coil. The one that makes no difference to the idle will be the culprit. If they all make the idle worse, then it is most likely a TPS or fuel issue.