How can I determine if there is a leak in the EHA. I replaced the engine in my car about three years ago after the old one dropped a valve and destroyed the piston at about 200K. I purchased a salvage engine with only 30,000 miles on it and it showed up with with all of the components attached to it, including the intake manifold and EHA. When I swapped out the engines I could not get the car to run even though it would initially fire up. So, I swapped the EHA's and it came to life. Thereafter, I noticed a large gash in the rubber boot under the EHA that I had removed. Is this the type of leak you are talking about?