What is the best way to check for vacuum leaks on injector leaks?

[talontsiboy24]

I heard spray soapy water but i dont think water is a good idea might get inside and mess things up? how about wd-40 or carb cleaner i mean whats best to spray around the injectors and vacuum lines where it wont cause issues?

 

[BIRDCLAWTSi]

I would use water,The other stuff is very flamable, Trust me, I caught a car on fire twice in a row. It wont mess anything up. Do it with the car running and see if it gets sucked in, Or you can do a boost leak test and spray soapy water around the suspect areas.;

 

[talontsiboy24]

I would use water,The other stuff is very flamable, Trust me, I caught a car on fire twice in a row. It wont mess anything up. Do it with the car running and see if it gets sucked in, Or you can do a boost leak test and spray soapy water around the suspect areas.;

well i dont wanna spray soapy water on the fuel injectors i just dont feel right maybe on the vacuum lines..it should bubble if its leaking right? and would it be best to do it on a cold start?