1. ...just unplug the piggy back.
You mean that electrical plug in the trunk right?
3. Next we used a guage tank...
What's a Guage Tank?
, theres also different ways of doing this, one side has air compressor hook up to a guage then to a little tank that you pour the BEM fuel injector cleaner into then another valve with guage then a line to your fuel rail.
huh? you have a picture of this?