Hello! I smoke tested my Cougar trying to find a vacuum leak. Three areas have smoke coming out: Intake manifold lines, the throttle body where the springs lead to for the pulley, and the EGR holes (which was replaced a few years ago).
My Cougar still idles lean when you put it in drive or reverse on a cold start. Once it warms up the idle is normal.
Does anyone know what these lines do? Did the circle inserts wear out? I push down on them to make sure they are snug but they still leak with the test.
I honestly do not know what to do next. Should I look for these parts to replace or come up with a temporary fix, like a sealant?
I would appreciate any help, regards.