Identifying new models for human eye diseases By Sara Cassidy, M.S., Ph.D. Although it is difficult to measure the impact of chronic conditions like eye disorders, Prevent Blindness America estimates that eye disorders and vision loss cost $139 billion in 2013, placing these conditions among the most expensive health disorders in the US.
Curing deadly engine vacuum leaks. Vacuum leaks can be located with spray carburetor cleaner or a can of WD-40. If the area is obstructed by linkage or hoses, use an extension nozzle to pinpoint the area of the vacuum leak.
Diagnosis is as follows: 1  Disconnect vacuum hose and connect a vacuum gauge to it. 2  If there's no change in vacuum reading, FIND OUT WHY (cracked hose, malfunctioning baro read solenoid...). 3  With engine running, measure reference power supply -- it should be very close to 5.0 volts.  Measure output signal voltage.