a good pair of needle nose 90 degree long handle pliers.

twist and pull

roy

You have to be careful not to damage the insulation or you will end up with misfire codes and a rough running engine.

There is a specific tool for pulling the wires off of the plugs. Can be found on ebay... slightly different designs by different manufacturers.

Here's a link of me changing a wire set:

http://www.youtube.com/watch?v=iAOMQHz84ko

Disconnect #1 and #4 injector plugs to get at #2 and #3 better.

Thomas