Many things can change the performance of the turbocharger. But the turbocharger is rarely the source of the problem.
A worn automatic belt tensioner has consequences beyond a loose belt.
There are several differential designs you might see in the field.
These systems are very efficient and are able to get the right amount of fuel into the cylinder so no fuel is wasted.
If you follow the recommended service procedures, repairs will go as “cool” as the air coming out of those A/C vents.
Included are articles on turbo service, understanding A/C compressors, curing belt noise and more!