i have a 1997 blazer with a vacuum leak on top of the of the motor where the wires from the harness go into the plastic intake right in back of the gas lines. i pulled the top of the wire cap off and wiggled the blue nipple caps around and the leak almost goes away is there a gasket to replace at this point under these 2 nipple caps there is alot of small wires there, i have failed emmisions has code Po507 idle above range /vacuum leak

 

need some insight to take this apart and fix

 

bought gasket set oval rubber gasket was snapped in half from previous installation all fixed cost about 50 bucks for gasket set