I can tell you having a EZ link has been a huge help for my personal shop.. i was having a issue with a buddies sled. it was acting like a fuel pressure issue but could not narrow it down so i replaced the pump with another one and the weekend it ran like a champ. i did do a fuel pump test and you could hear it so after i replaced it I was pondering so I pulled a old fuel tank down and installed the pump in it grabbed a extra harness and ecm i had and hooked all of it up to my 110 to 12v converter. hooked up a set of fuel lined and injectors and used zip ties on the injectors so the would not pop out and cut a OEM fuel tube apart and installed the ends on my gauge and ran the test again and found that after a 10 second run it would not hold pressure. so i now have a way to Bench test a fuel pump. if you don't have a EZ-Lynk i would strongly consider it if you are not wanting to spend a ton at the dealers. i have yet to try my Cat and Doo harnesses but in sure I will..
